Table: Unrecorded Unconditional Purchase Obligation [Table]

Line Label Object Class Period Type Balance Name
1 Unrecorded Unconditional Purchase Obligation [Table] [Table]

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 us-gaap:UnrecordedUnconditionalPurchaseObligationTable
2 Legal Entity [Axis] [Axis]

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 dei:LegalEntityAxis
3 Consolidated Entity [Domain] [Domain]

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 dei:EntityDomain
4 Unrecorded Unconditional Purchase Obligation Category of Item Purchased [Axis] [Axis]

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 us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
5 Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] [Domain]

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 us-gaap:UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain
6 Capital Additions [Member] [Member]

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 us-gaap:CapitalAdditionsMember
7 Inventories [Member] [Member]

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 us-gaap:InventoriesMember
8 Public Utilities, Inventory, Fuel [Member] [Member]

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 us-gaap:PublicUtilitiesInventoryFuelMember
9 Research and Development Arrangement [Member] [Member]

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 us-gaap:ResearchAndDevelopmentArrangementMember
10 Capacity [Member] [Member]

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 us-gaap:CapacityMember
11 Unrecorded Unconditional Purchase Obligation [Line Items] [Line Items]

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 us-gaap:UnrecordedUnconditionalPurchaseObligationLineItems
12 Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] [Concept] Text Block (HTML) For Period

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 us-gaap:UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock
13 Unrecorded Unconditional Purchase Obligation [Hierarchy] [Abstract]

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 added:UnrecordedUnconditionalPurchaseObligationHierarchy
14 Unrecorded Unconditional Purchase Obligation, Description [Concept] Text/String For Period

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 us-gaap:UnrecordedUnconditionalPurchaseObligationDescription
15 Term of Unrecorded Unconditional Purchase Obligation [Concept] Text/String For Period

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 us-gaap:TermOfUnrecordedUnconditionalPurchaseObligation
16 Unrecorded Unconditional Purchase Obligation, Nature of Variable Components [Concept] Text/String For Period

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 us-gaap:UnrecordedUnconditionalPurchaseObligationNatureOfVariableComponents
17 Unrecorded Unconditional Purchase Obligation, Purchases [Concept] Monetary For Period Debit us-gaap:UnrecordedUnconditionalPurchaseObligationPurchases
18 Unrecorded Unconditional Purchase Obligation, Imputed Interest [Concept] Monetary As Of Debit us-gaap:UnrecordedUnconditionalPurchaseObligationImputedInterest
19 Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required [Concept] Decimal As Of

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 us-gaap:UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired
20 Unrecorded Unconditional Purchase Obligation, Contract Quantity Received [Concept] Decimal As Of

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 us-gaap:UnrecordedUnconditionalPurchaseObligationContractQuantityReceived
21 Unrecorded Unconditional Purchase Obligation, Period Quantity Purchased [Concept] Decimal For Period

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 us-gaap:UnrecordedUnconditionalPurchaseObligationPeriodQuantityPurchased
22 Unrecorded Unconditional Purchase Obligation, Maximum Quantity [Concept] Decimal As Of

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 us-gaap:UnrecordedUnconditionalPurchaseObligationMaximumQuantity
23 Unrecorded Unconditional Purchase Obligation [Roll Up] [Abstract]

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 us-gaap:UnrecordedUnconditionalPurchaseObligationAbstract
24 Unrecorded Unconditional Purchase Obligation, Due within One Year [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
25 Unrecorded Unconditional Purchase Obligation, Due within Two Years [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
26 Unrecorded Unconditional Purchase Obligation, Due within Three Years [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
27 Unrecorded Unconditional Purchase Obligation, Due within Four Years [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
28 Unrecorded Unconditional Purchase Obligation, Due within Five Years [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
29 Unrecorded Unconditional Purchase Obligation, Due after Five Years [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
30 Unrecorded Unconditional Purchase Obligation, Total [Concept] Monetary As Of Credit us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount