Component: (Network and Table) | |
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Network | 2413402 - Disclosure - Asset Retirement Obligations (AROs) (Reconciliation Of Changes In Asset Retirement Obligations) (Details) (http://www.alliantenergy.com/role/AssetRetirementObligationsArosReconciliationOfChangesInAssetRetirementObligationsDetails) |
Table | Schedule of Asset Retirement Obligations [Table] |
Reporting Entity [Axis] | 0000352541 (http://www.sec.gov/CIK) |
Schedule of Asset Retirement Obligations [Line Items] | Period [Axis] | ||||||||
---|---|---|---|---|---|---|---|---|---|
2013-01-01 - 2013-12-31 | 2012-01-01 - 2012-12-31 | ||||||||
Project [Axis] | Project [Axis] | ||||||||
Project [Domain] | Sixth Street [Member] | Franklin County Wind Project [Member] | NelsonDewey [Member] | Project [Domain] | |||||
Legal Entity [Axis] | Legal Entity [Axis] | Legal Entity [Axis] | Legal Entity [Axis] | Legal Entity [Axis] | |||||
Ipl [Member] | Wpl [Member] | Entity [Domain] | Ipl [Member] | Resources [Member] | Wpl [Member] | Ipl [Member] | Wpl [Member] | Entity [Domain] | |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | |||||||||
Balance, January 1 | |||||||||
Revisions in estimated cash flows | ( | ( | ( | ||||||
Liabilities settled | ( | ( | ( | ( | ( | ( | |||
Liabilities incurred | |||||||||
Accretion expense | |||||||||
Balance, December 31 | 45,500,000 | 46,900,000 | 101,500,000 |