Disclosure informationRecorded Unconditional Purchase Obligation, by Category of Item Purchased [Hierarchy]


Label:	Recorded Unconditional Purchase Obligation, by Category of Item Purchased [Hierarchy]
Name:	RecordedUnconditionalPurchaseObligationHierarchy
Parent Topic:	Commitments
Documentation:	Disclosure of information about recorded unconditional purchase obligation by category of item purchased.
Commentary:
Level:	Detail
Information model:	[Hierarchy]
Completion state:	WIP
Status:
US GAAP XBRL Taxonomy Text Block:	us-gaap:RecordedUnconditionalPurchaseObligationsTextBlock
US GAAP XBRL Taxonomy Network:	http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies \| Machine-readable \| Human-readable

Prototype of Disclosure (Representation structure): Machine Readable

Line	Label	Object Class (Data type)	Period Type	Balance	Report Element Name
1	Recorded Unconditional Purchase Obligation [Table]	Table			us-gaap:RecordedUnconditionalPurchaseObligationTable
2	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
3	Consolidated Entity [Domain]	Member			dei:EntityDomain
4	Recorded Unconditional Purchase Obligation Category of Item Purchased [Axis]	Axis			us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
5	Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]	Member			us-gaap:UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain
6	Capital Additions [Member]	Member			us-gaap:CapitalAdditionsMember
7	Inventories [Member]	Member			us-gaap:InventoriesMember
8	Public Utilities, Inventory, Fuel [Member]	Member			us-gaap:PublicUtilitiesInventoryFuelMember
9	Research and Development Arrangement [Member]	Member			us-gaap:ResearchAndDevelopmentArrangementMember
10	Capacity [Member]	Member			us-gaap:CapacityMember
11	Recorded Unconditional Purchase Obligation [Line Items]	LineItems			us-gaap:RecordedUnconditionalPurchaseObligationLineItems
12	Recorded Unconditional Purchase Obligation [Hierarchy]	Concept (Text/String)	For Period		added:RecordedUnconditionalPurchaseObligationHierarchy
13	Recorded Unconditional Purchase Obligation, Description	Concept (Text/String)	For Period		us-gaap:RecordedUnconditionalPurchaseObligationDescription
14	Recorded Unconditional Purchase Obligation, Amount of Maturities and Sinking Fund Requirements	Concept (Monetary)	As Of	Credit	us-gaap:RecordedUnconditionalPurchaseObligationAmountOfMaturitiesAndSinkingFundRequirements
15	Recorded Unconditional Purchase Obligation, Nonfinancial Assets Pledged as Security, Description	Concept (Text/String)	For Period		us-gaap:RecordedUnconditionalPurchaseObligationNonfinancialAssetsPledgedAsSecurityDescription
16	Recorded Unconditional Purchase Obligation, Nonfinancial Assets Pledged as Security, Value	Concept (Monetary)	As Of	Debit	us-gaap:RecordedUnconditionalPurchaseObligationNonfinancialAssetsPledgedAsSecurityValue
17	Recorded Unconditional Purchase Obligation, Minimum Quantity Required	Concept (Decimal)	As Of		us-gaap:RecordedUnconditionalPurchaseObligationMinimumQuantityRequired

From	Arcrole (predicate)	To
disclosures:RecordedUnconditionalPurchaseObligationHierarchy	rules-arcroles:disclosure-isSECType	fro:DisclosureType
disclosures:RecordedUnconditionalPurchaseObligationHierarchy	rules-arcroles:disclosure-hasConceptArrangementPattern	fro:Hierarchy
disclosures:RecordedUnconditionalPurchaseObligationHierarchy	rules-arcroles:disclosure-requiresAxis	us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
disclosures:RecordedUnconditionalPurchaseObligationHierarchy	rules-arcroles:disclosure-requiresConcept	us-gaap:RecordedUnconditionalPurchaseObligationDescription