Analysis: Nature of Business, Basis of Reporting, Significant Accounting Policies, Revenues Recognition

Entity Registrant Name AMERICAN AIRLINES INC
CIK 0000004515
Accession number 0001193125-13-155505
Link to XBRL instance http://www.sec.gov/Archives/edgar/data/4515/000119312513155505/ck0000004515-20121231.xml
Fiscal year end --12-31
Fiscal year focus 2012
Fiscal period focus FY
Current balance sheet date 2012-12-31
Current year-to-date income statement start date 2012-01-01

Commentary All disclosures seem appropriate.

NATURE OF BUSINESS concept us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock
Basis of Presentation The accompanying consolidated financial statements as of December 31, 2012 and for the three years ended December 31, 2012 include the accounts of AMR and its wholly owned subsidiaries, including (i) its principal subsidiary, American Airlines, Inc. (American) and (ii) its regional airline subsidiary, AMR Eagle Holding Corporation (AMR Eagle), which has two primary subsidiaries, American Eagle Airlines, Inc. and Executive Airlines, Inc. . The consolidated financial statements as of and for the years ended December 31, 2012, 2011 and 2010 include the accounts of the Company and its wholly owned subsidiaries as well as variable interest entities (VIEs) for which the Company is the primary beneficiary. All significant intercompany transactions have been eliminated.
The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP), including the provisions of ASC 852 “Reorganizations” (ASC 852). ASC 852 requires that the financial statements of the Company, for periods subsequent to the filing of the Chapter 11 Cases, distinguish transactions and events that are directly associated with the reorganization from the ongoing operations of the business. Accordingly, certain revenues, expenses (including professional fees), realized gains and losses and provisions for losses that are realized or incurred in the Chapter 11 Cases are recorded in reorganization items, net on the accompanying Consolidated Statement of Operations. In addition, prepetition obligations that may be impacted by the Chapter 11 reorganization process have been classified on the Consolidated Balance Sheet in liabilities subject to compromise. These liabilities are reported at the amounts expected to be allowed by the Bankruptcy Court, even if they may be settled for lesser amounts.
Certain of our non-U.S. subsidiaries are not part of the Chapter 11 Cases. Since the non-US subsidiaries not part of the bankruptcy filing do not have significant transactions, we do not separately disclose the condensed combined financial statements of such non-U.S. subsidiaries s in accordance with the requirements of reorganization accounting.
The Company has also prepared these consolidated financial statements on a going concern basis, which contemplates continuity of operations, realization of assets and satisfaction of liabilities in the ordinary course of business. Accordingly, the Company’s consolidated financial statements do not include any adjustments relating to the recoverability of assets and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.
As a result of the Chapter 11 proceedings, the satisfaction of our liabilities and funding of ongoing operations are subject to uncertainty and, accordingly, there is a substantial doubt of the Company’s ability to continue as a going concern.
The accompanying consolidated financial statements do not purport to reflect or provide for the consequences of the Chapter 11 Cases, other than as set forth under “liabilities subject to compromise” on the accompanying Consolidated Balance Sheets and “income (loss) before reorganization items, net” and “reorganization items, net” on the accompanying Consolidated Statements of Operations (see Note 1 to the consolidated financial statements). In particular, the financial statements do not purport to show (1) as to assets, their realizable value on a liquidation basis or their availability to satisfy liabilities; (2) as to prepetition liabilities, the amounts that may be allowed for claims or contingencies, or the status and priority thereof; (3) as to shareowners’ equity accounts, the effect of any changes that may be made to the Debtors' capitalization; or (4) as to operations, the effect of any changes that may be made to the Debtors' business.
While operating as debtors-in-possession under Chapter 11 of the Bankruptcy Code, the Debtors may sell or otherwise dispose of or liquidate assets or settle liabilities, subject to the approval of the Bankruptcy Court or otherwise as permitted in the ordinary course of business. Moreover, the ultimate plan of reorganization for the Debtors could materially change the amounts and classifications in the historical consolidated financial statements.
New Accounting Pronouncements In December 2011, the FASB issued ASU 2011-11, “Disclosures About Offsetting Assets and


Liabilities.”  This update creates new disclosure requirements about the nature of an entity’s rights of setoff and related arrangements associated with its financial instruments and derivative instruments. The disclosure requirements in this update are effective for annual reporting periods, and interim periods within those years, beginning on or after January 1, 2013.  The Company is currently evaluating the impact this update will have on its disclosures.

In July 2012, the FASB issued ASU 2012-02, “Testing Indefinite-Lived Intangible Assets for Impairment.” This update amends ASC 350, “Intangibles—Goodwill and Other” to allow entities an option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test.  Under that option, an entity no longer would be required to calculate the fair value of the intangible asset unless the entity determines, based on that qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount.  The amendments in this update are effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012.  The Company is currently evaluating the impact this update may have on its indefinite-lived intangibles impairment testing.

In August of 2012, the SEC issued a final rule implementing Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act that imposes reporting requirements on issuers who use or may use “Conflict Minerals,” defined as columbite-tantalite (the metal ore from which tantalum is extracted), cassiterite (the metal ore from which tin is extracted), gold, and wolframite (the metal ore from which tungsten is extracted), or their derivatives, originating from the Democratic Republic of the Congo and neighboring countries (collectively, “covered countries”). The rule was mandated in response to humanitarian concerns that trade in conflict minerals are used to finance armed groups in the covered countries. The rule describes assessment and reporting requirements for all issuers for which conflict minerals originating in a covered country are necessary to the functionality or production of a product manufactured, or contracted to be manufactured, by the issuer. Such issuers are required to file a newly created Form SD annually by May 31 for the prior calendar year. Initial Form SDs are required to be filed by May 31, 2014 for the calendar year 2013. The Company is currently in the process of assessing whether it will be required to file a Form SD for calendar year 2013 and determining necessary processes and procedures to collect information necessary to make any required filing. The Company does not anticipate that any requirement to file this new Form SD will have a material impact on its consolidated financial statements.

BASIS OF REPORTING concept us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock
2.       Summary of Accounting Policies
Basis of Presentation The accompanying consolidated financial statements as of December 31, 2012 and for the three years ended December 31, 2012 include the accounts of AMR and its wholly owned subsidiaries, including (i) its principal subsidiary, American Airlines, Inc. (American) and (ii) its regional airline subsidiary, AMR Eagle Holding Corporation (AMR Eagle), which has two primary subsidiaries, American Eagle Airlines, Inc. and Executive Airlines, Inc. . The consolidated financial statements as of and for the years ended December 31, 2012, 2011 and 2010 include the accounts of the Company and its wholly owned subsidiaries as well as variable interest entities (VIEs) for which the Company is the primary beneficiary. All significant intercompany transactions have been eliminated.
The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP), including the provisions of ASC 852 “Reorganizations” (ASC 852). ASC 852 requires that the financial statements of the Company, for periods subsequent to the filing of the Chapter 11 Cases, distinguish transactions and events that are directly associated with the reorganization from the ongoing operations of the business. Accordingly, certain revenues, expenses (including professional fees), realized gains and losses and provisions for losses that are realized or incurred in the Chapter 11 Cases are recorded in reorganization items, net on the accompanying Consolidated Statement of Operations. In addition, prepetition obligations that may be impacted by the Chapter 11 reorganization process have been classified on the Consolidated Balance Sheet in liabilities subject to compromise. These liabilities are reported at the amounts expected to be allowed by the Bankruptcy Court, even if they may be settled for lesser amounts.
Certain of our non-U.S. subsidiaries are not part of the Chapter 11 Cases. Since the non-US subsidiaries not part of the bankruptcy filing do not have significant transactions, we do not separately disclose the condensed combined financial statements of such non-U.S. subsidiaries s in accordance with the requirements of reorganization accounting.
The Company has also prepared these consolidated financial statements on a going concern basis, which contemplates continuity of operations, realization of assets and satisfaction of liabilities in the ordinary course of business. Accordingly, the Company’s consolidated financial statements do not include any adjustments relating to the recoverability of assets and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.
As a result of the Chapter 11 proceedings, the satisfaction of our liabilities and funding of ongoing operations are subject to uncertainty and, accordingly, there is a substantial doubt of the Company’s ability to continue as a going concern.
The accompanying consolidated financial statements do not purport to reflect or provide for the consequences of the Chapter 11 Cases, other than as set forth under “liabilities subject to compromise” on the accompanying Consolidated Balance Sheets and “income (loss) before reorganization items, net” and “reorganization items, net” on the accompanying Consolidated Statements of Operations (see Note 1 to the consolidated financial statements). In particular, the financial statements do not purport to show (1) as to assets, their realizable value on a liquidation basis or their availability to satisfy liabilities; (2) as to prepetition liabilities, the amounts that may be allowed for claims or contingencies, or the status and priority thereof; (3) as to shareowners’ equity accounts, the effect of any changes that may be made to the Debtors' capitalization; or (4) as to operations, the effect of any changes that may be made to the Debtors' business.
While operating as debtors-in-possession under Chapter 11 of the Bankruptcy Code, the Debtors may sell or otherwise dispose of or liquidate assets or settle liabilities, subject to the approval of the Bankruptcy Court or otherwise as permitted in the ordinary course of business. Moreover, the ultimate plan of reorganization for the Debtors could materially change the amounts and classifications in the historical consolidated financial statements.
New Accounting Pronouncements In December 2011, the FASB issued ASU 2011-11, “Disclosures About Offsetting Assets and


Liabilities.”  This update creates new disclosure requirements about the nature of an entity’s rights of setoff and related arrangements associated with its financial instruments and derivative instruments. The disclosure requirements in this update are effective for annual reporting periods, and interim periods within those years, beginning on or after January 1, 2013.  The Company is currently evaluating the impact this update will have on its disclosures.

In July 2012, the FASB issued ASU 2012-02, “Testing Indefinite-Lived Intangible Assets for Impairment.” This update amends ASC 350, “Intangibles—Goodwill and Other” to allow entities an option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test.  Under that option, an entity no longer would be required to calculate the fair value of the intangible asset unless the entity determines, based on that qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount.  The amendments in this update are effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012.  The Company is currently evaluating the impact this update may have on its indefinite-lived intangibles impairment testing.

In August of 2012, the SEC issued a final rule implementing Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act that imposes reporting requirements on issuers who use or may use “Conflict Minerals,” defined as columbite-tantalite (the metal ore from which tantalum is extracted), cassiterite (the metal ore from which tin is extracted), gold, and wolframite (the metal ore from which tungsten is extracted), or their derivatives, originating from the Democratic Republic of the Congo and neighboring countries (collectively, “covered countries”). The rule was mandated in response to humanitarian concerns that trade in conflict minerals are used to finance armed groups in the covered countries. The rule describes assessment and reporting requirements for all issuers for which conflict minerals originating in a covered country are necessary to the functionality or production of a product manufactured, or contracted to be manufactured, by the issuer. Such issuers are required to file a newly created Form SD annually by May 31 for the prior calendar year. Initial Form SDs are required to be filed by May 31, 2014 for the calendar year 2013. The Company is currently in the process of assessing whether it will be required to file a Form SD for calendar year 2013 and determining necessary processes and procedures to collect information necessary to make any required filing. The Company does not anticipate that any requirement to file this new Form SD will have a material impact on its consolidated financial statements.
Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Restricted Cash and Short-term Investments The Company has restricted cash and short-term investments related primarily to collateral held to support projected workers’ compensation obligations and funds held for certain tax obligations.
Inventories Spare parts, materials and supplies relating to flight equipment are carried at average acquisition cost and are expensed when used in operations. Allowances for obsolescence are provided—over the estimated useful life of the related aircraft and engines—for spare parts expected to be on hand at the date aircraft are retired from service. Allowances are also provided for spare parts currently identified as excess and obsolete. These allowances are based on management estimates, which are subject to change.
Maintenance and Repair Costs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists.
Intangible Assets Route acquisition costs and airport operating and gate lease rights represent the purchase price attributable to route authorities (including international airport take-off and landing slots), domestic airport take-off and landing slots and airport gate leasehold rights acquired. Indefinite-lived intangible assets (route acquisition costs and international slots and related international take-off and landing slots) are tested for impairment annually on December 31, rather than amortized, or when a triggering event occurs, in accordance with U.S. GAAP. Such triggering events may include significant changes to the Company’s network or capacity, or the implementation of open skies agreements in countries where the Company operates flights. Airport operating and gate lease rights are being amortized on a straight-line basis over 25 years to a zero residual value.
Statements of Cash Flows Short-term investments, without regard to remaining maturity at acquisition, are not considered as cash equivalents for purposes of the statements of cash flows.
Measurement of Asset Impairments The Company records impairment charges on long-lived assets used in operations when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the asset are less than the carrying amount of the asset and the net book value of the asset exceeds its estimated fair value. In making these determinations, the Company uses certain assumptions, including, but not limited to: (i) estimated fair value of the asset; and (ii) estimated future cash flows expected to be generated by the asset,


which are based on additional assumptions such as asset utilization, length of service the asset will be used in the Company’s operations and estimated salvage values.
Equipment and Property The provision for depreciation of operating equipment and property is computed on the straight-line method applied to each unit of property, except that major rotable parts, avionics and assemblies are depreciated on a group basis. The depreciable lives used for the principal depreciable asset classifications are:
 
  
Depreciable Life
 
 
American jet aircraft and engines
  
20 - 30 years
Other regional aircraft and engines
  
16 - 20 years
Major rotable parts, avionics and assemblies
  
Life of equipment to which applicable
Improvements to leased flight equipment
  
Lesser of remaining lease term or expected useful life
Buildings and improvements (principally on leased land)
  
5 - 30 years or term of lease, including estimated renewal options when renewal is economically compelled at key airports
Furniture, fixtures and other equipment
  
3 - 10 years
Capitalized software
  
5 - 10 years
Residual values for aircraft, engines, major rotable parts, avionics and assemblies are generally five to ten percent, except when guaranteed by a third party for a different amount.
Equipment and property under capital leases are amortized over the term of the leases or, in the case of certain aircraft, over their expected useful lives. Lease terms vary but are generally six to 25 years for aircraft and seven to 40 years for other leased equipment and property.
Regional Affiliates Revenue from ticket sales is generally recognized when service is provided. Regional Affiliates revenues for flights connecting to American flights are based on industry standard proration agreements.
Passenger Revenue Passenger ticket sales are initially recorded as a component of Air traffic liability. Revenue derived from ticket sales is recognized at the time service is provided. However, due to various factors, including the complex pricing structure and interline agreements throughout the industry, certain amounts are recognized in revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized, including breakage. These estimates are generally based upon the evaluation of historical trends, including the use of regression analysis and other methods to model the outcome of future events based on the Company’s historical experience, and are recorded at the scheduled time of departure.
Various taxes and fees assessed on the sale of tickets to end customers are collected by the Company as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statement of operations and recorded as a liability until remitted to the appropriate taxing authority.
Frequent Flyer Program The estimated incremental cost of providing free travel awards is accrued for mileage credits earned by using American’s service that are expected to be redeemed in the future. American also accrues a frequent flyer liability for the mileage credits that are expected to be used for travel on participating airlines based on historical usage patterns and contractual rates. American sells mileage credits and related services to companies participating in its frequent flyer program. The portion of the revenue related to the sale of mileage credits, representing the revenue for air transportation sold, is valued at fair value and is deferred and amortized over 28 months, which approximates the expected period over which the mileage credits are used. Breakage of sold miles is recognized over the estimated period of usage. The remaining portion of the revenue, representing the marketing services sold and administrative costs associated with operating the AAdvantage program, is recognized upon sale as a component of Other revenues, as the related services have been provided. The Company’s total liability for future AAdvantage award redemptions for free, discounted or upgraded travel on American, American Eagle or participating airlines as well as unrecognized revenue from selling AAdvantage miles was approximately $1.7 billion (and is recorded as a component of Air traffic liability on the accompanying consolidated balance sheets) at December 31, 2012 and $1.6 billion as of December 31, 2011.
Income Taxes The Company generally believes that the positions taken on previously filed income tax returns are more likely than not to be sustained by the taxing authorities. The Company has recorded income tax and related interest liabilities where the Company believes its position may not be sustained or where the full income tax benefit will not be recognized. Thus, the effects of potential income tax benefits resulting from the Company’s unrecognized tax positions are not reflected in the tax balances of the financial statements. Recognized and unrecognized tax positions are reviewed and adjusted as events occur that affect the Company’s judgment about the recognizability of income tax benefits, such as lapsing of applicable statutes of limitations, conclusion of tax audits, release of administrative guidance, or rendering of a court decision affecting a particular tax position.


Advertising Costs The Company expenses on a straight-line basis the costs of advertising as incurred throughout the year. Advertising expense was $153 million for the year ended December 31, 2012, $186 million for the year ended December 31, 2011 and $165 million for the year ended December 31, 2010.
Subsequent Events In connection with preparation of the consolidated financial statements and in accordance U.S. GAAP, the Company evaluated subsequent events after the balance sheet date of December 31, 2012 and identified items as set forth in Note 17 to the consolidated financial statements.

SIGNIFICANT ACCOUNTING POLICIES concept us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock
2.       Summary of Accounting Policies
Basis of Presentation The accompanying consolidated financial statements as of December 31, 2012 and for the three years ended December 31, 2012 include the accounts of AMR and its wholly owned subsidiaries, including (i) its principal subsidiary, American Airlines, Inc. (American) and (ii) its regional airline subsidiary, AMR Eagle Holding Corporation (AMR Eagle), which has two primary subsidiaries, American Eagle Airlines, Inc. and Executive Airlines, Inc. . The consolidated financial statements as of and for the years ended December 31, 2012, 2011 and 2010 include the accounts of the Company and its wholly owned subsidiaries as well as variable interest entities (VIEs) for which the Company is the primary beneficiary. All significant intercompany transactions have been eliminated.
The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP), including the provisions of ASC 852 “Reorganizations” (ASC 852). ASC 852 requires that the financial statements of the Company, for periods subsequent to the filing of the Chapter 11 Cases, distinguish transactions and events that are directly associated with the reorganization from the ongoing operations of the business. Accordingly, certain revenues, expenses (including professional fees), realized gains and losses and provisions for losses that are realized or incurred in the Chapter 11 Cases are recorded in reorganization items, net on the accompanying Consolidated Statement of Operations. In addition, prepetition obligations that may be impacted by the Chapter 11 reorganization process have been classified on the Consolidated Balance Sheet in liabilities subject to compromise. These liabilities are reported at the amounts expected to be allowed by the Bankruptcy Court, even if they may be settled for lesser amounts.
Certain of our non-U.S. subsidiaries are not part of the Chapter 11 Cases. Since the non-US subsidiaries not part of the bankruptcy filing do not have significant transactions, we do not separately disclose the condensed combined financial statements of such non-U.S. subsidiaries s in accordance with the requirements of reorganization accounting.
The Company has also prepared these consolidated financial statements on a going concern basis, which contemplates continuity of operations, realization of assets and satisfaction of liabilities in the ordinary course of business. Accordingly, the Company’s consolidated financial statements do not include any adjustments relating to the recoverability of assets and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.
As a result of the Chapter 11 proceedings, the satisfaction of our liabilities and funding of ongoing operations are subject to uncertainty and, accordingly, there is a substantial doubt of the Company’s ability to continue as a going concern.
The accompanying consolidated financial statements do not purport to reflect or provide for the consequences of the Chapter 11 Cases, other than as set forth under “liabilities subject to compromise” on the accompanying Consolidated Balance Sheets and “income (loss) before reorganization items, net” and “reorganization items, net” on the accompanying Consolidated Statements of Operations (see Note 1 to the consolidated financial statements). In particular, the financial statements do not purport to show (1) as to assets, their realizable value on a liquidation basis or their availability to satisfy liabilities; (2) as to prepetition liabilities, the amounts that may be allowed for claims or contingencies, or the status and priority thereof; (3) as to shareowners’ equity accounts, the effect of any changes that may be made to the Debtors' capitalization; or (4) as to operations, the effect of any changes that may be made to the Debtors' business.
While operating as debtors-in-possession under Chapter 11 of the Bankruptcy Code, the Debtors may sell or otherwise dispose of or liquidate assets or settle liabilities, subject to the approval of the Bankruptcy Court or otherwise as permitted in the ordinary course of business. Moreover, the ultimate plan of reorganization for the Debtors could materially change the amounts and classifications in the historical consolidated financial statements.
New Accounting Pronouncements In December 2011, the FASB issued ASU 2011-11, “Disclosures About Offsetting Assets and


Liabilities.”  This update creates new disclosure requirements about the nature of an entity’s rights of setoff and related arrangements associated with its financial instruments and derivative instruments. The disclosure requirements in this update are effective for annual reporting periods, and interim periods within those years, beginning on or after January 1, 2013.  The Company is currently evaluating the impact this update will have on its disclosures.

In July 2012, the FASB issued ASU 2012-02, “Testing Indefinite-Lived Intangible Assets for Impairment.” This update amends ASC 350, “Intangibles—Goodwill and Other” to allow entities an option to first assess qualitative factors to determine whether it is necessary to perform the quantitative impairment test.  Under that option, an entity no longer would be required to calculate the fair value of the intangible asset unless the entity determines, based on that qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount.  The amendments in this update are effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012.  The Company is currently evaluating the impact this update may have on its indefinite-lived intangibles impairment testing.

In August of 2012, the SEC issued a final rule implementing Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act that imposes reporting requirements on issuers who use or may use “Conflict Minerals,” defined as columbite-tantalite (the metal ore from which tantalum is extracted), cassiterite (the metal ore from which tin is extracted), gold, and wolframite (the metal ore from which tungsten is extracted), or their derivatives, originating from the Democratic Republic of the Congo and neighboring countries (collectively, “covered countries”). The rule was mandated in response to humanitarian concerns that trade in conflict minerals are used to finance armed groups in the covered countries. The rule describes assessment and reporting requirements for all issuers for which conflict minerals originating in a covered country are necessary to the functionality or production of a product manufactured, or contracted to be manufactured, by the issuer. Such issuers are required to file a newly created Form SD annually by May 31 for the prior calendar year. Initial Form SDs are required to be filed by May 31, 2014 for the calendar year 2013. The Company is currently in the process of assessing whether it will be required to file a Form SD for calendar year 2013 and determining necessary processes and procedures to collect information necessary to make any required filing. The Company does not anticipate that any requirement to file this new Form SD will have a material impact on its consolidated financial statements.
Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Restricted Cash and Short-term Investments The Company has restricted cash and short-term investments related primarily to collateral held to support projected workers’ compensation obligations and funds held for certain tax obligations.
Inventories Spare parts, materials and supplies relating to flight equipment are carried at average acquisition cost and are expensed when used in operations. Allowances for obsolescence are provided—over the estimated useful life of the related aircraft and engines—for spare parts expected to be on hand at the date aircraft are retired from service. Allowances are also provided for spare parts currently identified as excess and obsolete. These allowances are based on management estimates, which are subject to change.
Maintenance and Repair Costs Maintenance and repair costs for owned and leased flight equipment are charged to operating expense as incurred, except costs incurred for maintenance and repair under flight hour maintenance contract agreements, which are accrued based on contractual terms when an obligation exists.
Intangible Assets Route acquisition costs and airport operating and gate lease rights represent the purchase price attributable to route authorities (including international airport take-off and landing slots), domestic airport take-off and landing slots and airport gate leasehold rights acquired. Indefinite-lived intangible assets (route acquisition costs and international slots and related international take-off and landing slots) are tested for impairment annually on December 31, rather than amortized, or when a triggering event occurs, in accordance with U.S. GAAP. Such triggering events may include significant changes to the Company’s network or capacity, or the implementation of open skies agreements in countries where the Company operates flights. Airport operating and gate lease rights are being amortized on a straight-line basis over 25 years to a zero residual value.
Statements of Cash Flows Short-term investments, without regard to remaining maturity at acquisition, are not considered as cash equivalents for purposes of the statements of cash flows.
Measurement of Asset Impairments The Company records impairment charges on long-lived assets used in operations when events and circumstances indicate that the assets may be impaired. An asset or group of assets is considered impaired when the undiscounted cash flows estimated to be generated by the asset are less than the carrying amount of the asset and the net book value of the asset exceeds its estimated fair value. In making these determinations, the Company uses certain assumptions, including, but not limited to: (i) estimated fair value of the asset; and (ii) estimated future cash flows expected to be generated by the asset,


which are based on additional assumptions such as asset utilization, length of service the asset will be used in the Company’s operations and estimated salvage values.
Equipment and Property The provision for depreciation of operating equipment and property is computed on the straight-line method applied to each unit of property, except that major rotable parts, avionics and assemblies are depreciated on a group basis. The depreciable lives used for the principal depreciable asset classifications are:
 
  
Depreciable Life
 
 
American jet aircraft and engines
  
20 - 30 years
Other regional aircraft and engines
  
16 - 20 years
Major rotable parts, avionics and assemblies
  
Life of equipment to which applicable
Improvements to leased flight equipment
  
Lesser of remaining lease term or expected useful life
Buildings and improvements (principally on leased land)
  
5 - 30 years or term of lease, including estimated renewal options when renewal is economically compelled at key airports
Furniture, fixtures and other equipment
  
3 - 10 years
Capitalized software
  
5 - 10 years
Residual values for aircraft, engines, major rotable parts, avionics and assemblies are generally five to ten percent, except when guaranteed by a third party for a different amount.
Equipment and property under capital leases are amortized over the term of the leases or, in the case of certain aircraft, over their expected useful lives. Lease terms vary but are generally six to 25 years for aircraft and seven to 40 years for other leased equipment and property.
Regional Affiliates Revenue from ticket sales is generally recognized when service is provided. Regional Affiliates revenues for flights connecting to American flights are based on industry standard proration agreements.
Passenger Revenue Passenger ticket sales are initially recorded as a component of Air traffic liability. Revenue derived from ticket sales is recognized at the time service is provided. However, due to various factors, including the complex pricing structure and interline agreements throughout the industry, certain amounts are recognized in revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized, including breakage. These estimates are generally based upon the evaluation of historical trends, including the use of regression analysis and other methods to model the outcome of future events based on the Company’s historical experience, and are recorded at the scheduled time of departure.
Various taxes and fees assessed on the sale of tickets to end customers are collected by the Company as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statement of operations and recorded as a liability until remitted to the appropriate taxing authority.
Frequent Flyer Program The estimated incremental cost of providing free travel awards is accrued for mileage credits earned by using American’s service that are expected to be redeemed in the future. American also accrues a frequent flyer liability for the mileage credits that are expected to be used for travel on participating airlines based on historical usage patterns and contractual rates. American sells mileage credits and related services to companies participating in its frequent flyer program. The portion of the revenue related to the sale of mileage credits, representing the revenue for air transportation sold, is valued at fair value and is deferred and amortized over 28 months, which approximates the expected period over which the mileage credits are used. Breakage of sold miles is recognized over the estimated period of usage. The remaining portion of the revenue, representing the marketing services sold and administrative costs associated with operating the AAdvantage program, is recognized upon sale as a component of Other revenues, as the related services have been provided. The Company’s total liability for future AAdvantage award redemptions for free, discounted or upgraded travel on American, American Eagle or participating airlines as well as unrecognized revenue from selling AAdvantage miles was approximately $1.7 billion (and is recorded as a component of Air traffic liability on the accompanying consolidated balance sheets) at December 31, 2012 and $1.6 billion as of December 31, 2011.
Income Taxes The Company generally believes that the positions taken on previously filed income tax returns are more likely than not to be sustained by the taxing authorities. The Company has recorded income tax and related interest liabilities where the Company believes its position may not be sustained or where the full income tax benefit will not be recognized. Thus, the effects of potential income tax benefits resulting from the Company’s unrecognized tax positions are not reflected in the tax balances of the financial statements. Recognized and unrecognized tax positions are reviewed and adjusted as events occur that affect the Company’s judgment about the recognizability of income tax benefits, such as lapsing of applicable statutes of limitations, conclusion of tax audits, release of administrative guidance, or rendering of a court decision affecting a particular tax position.


Advertising Costs The Company expenses on a straight-line basis the costs of advertising as incurred throughout the year. Advertising expense was $153 million for the year ended December 31, 2012, $186 million for the year ended December 31, 2011 and $165 million for the year ended December 31, 2010.
Subsequent Events In connection with preparation of the consolidated financial statements and in accordance U.S. GAAP, the Company evaluated subsequent events after the balance sheet date of December 31, 2012 and identified items as set forth in Note 17 to the consolidated financial statements.

REVENUE RECOGNITION concept us-gaap:RevenueRecognitionPolicyTextBlock
Passenger Revenue Passenger ticket sales are initially recorded as a component of Air traffic liability. Revenue derived from ticket sales is recognized at the time service is provided. However, due to various factors, including the complex pricing structure and interline agreements throughout the industry, certain amounts are recognized in revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized, including breakage. These estimates are generally based upon the evaluation of historical trends, including the use of regression analysis and other methods to model the outcome of future events based on the Company’s historical experience, and are recorded at the scheduled time of departure.
Various taxes and fees assessed on the sale of tickets to end customers are collected by the Company as an agent and remitted to taxing authorities. These taxes and fees have been presented on a net basis in the accompanying consolidated statement of operations and recorded as a liability until remitted to the appropriate taxing authority.


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