$TVE
Tennessee Valley Authority Stock $tve

$tve Overview Financials Valuation SEC Filings Company Website

2026 Q3 Form 10-K Financial Statement

#000137698620000030 Filed on November 17, 2020

Income Statement

Concept	2024 Q3	2023 Q3
Revenue
YoY Change
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income
YoY Change
Income Tax
% Of Pretax Income
Net Earnings
YoY Change
Net Earnings / Revenue
Basic Earnings Per Share
Diluted Earnings Per Share
COMMON SHARES
Basic Shares Outstanding	0.000 shares	0.000 shares
Diluted Shares Outstanding

Balance Sheet

Concept	2026 Q3	2024 Q3	2023 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$502.0M	$501.0M
Short-Term Investments
Other Short-Term Assets		$120.0M	$134.0M
YoY Change		-10.45%	-47.86%
Inventory		$1.155B	$1.108B
Prepaid Expenses			$25.00M
Receivables		$1.801B	$1.745B
Other Receivables
Total Short-Term Assets		$3.769B	$3.666B
YoY Change		2.81%	-7.75%
LONG-TERM ASSETS
Property, Plant & Equipment		$39.07B	$37.48B
YoY Change		4.22%	1.69%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$344.0M	$330.0M
YoY Change		4.24%	-16.24%
Total Long-Term Assets		$53.93B	$47.68B
YoY Change		13.12%	0.98%
TOTAL ASSETS
Total Short-Term Assets		$3.769B	$3.666B
Total Long-Term Assets		$53.93B	$47.68B
Total Assets		$57.70B	$51.34B
YoY Change		12.39%	0.3%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due			$1.022B
YoY Change			3424.14%
Total Short-Term Liabilities		$5.873B	$4.873B
YoY Change		20.52%	4.91%
LONG-TERM LIABILITIES
Long-Term Debt		$18.76B	$18.78B
YoY Change		-0.07%	-0.09%
Other Long-Term Liabilities		$1.712B	$1.211B
YoY Change		41.37%	-18.45%
Total Long-Term Liabilities		$20.48B	$19.99B
YoY Change		2.44%	-1.43%
TOTAL LIABILITIES
Total Short-Term Liabilities		$5.873B	$4.873B
Total Long-Term Liabilities		$20.48B	$19.99B
Total Liabilities		$26.35B	$24.86B
YoY Change		5.99%	-0.25%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity
YoY Change
Total Liabilities & Shareholders Equity		$57.70B	$51.34B
YoY Change		12.39%

Cashflow Statement

Concept	2026 Q3	2024 Q3	2023 Q3
OPERATING ACTIVITIES
Net Income
YoY Change
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities
YoY Change
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities
YoY Change
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities
YoY Change
NET CHANGE
Cash From Operating Activities
Cash From Investing Activities
Cash From Financing Activities
Net Change In Cash
YoY Change
FREE CASH FLOW
Cash From Operating Activities
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001376986
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	0	shares
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020Q3	dei	Entity Public Float EntityPublicFloat	0	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1000000	USD
CY2017Q3	us-gaap	Business Acquisition Percentage Of Voting Interests Acquired BusinessAcquisitionPercentageOfVotingInterestsAcquired	1
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	36000000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	110000000	USD
CY2017Q3	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Costs BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCosts	74000000	USD
CY2019	us-gaap	Business Combination Separately Recognized Transactions Expenses And Losses Recognized BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized	1000000	USD
CY2019	us-gaap	Business Combination Separately Recognized Transactions Net Gains And Losses BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses	3000000	USD
CY2017Q3	tve	Carryingvalueofleaseleasebackobligationssettled Carryingvalueofleaseleasebackobligationssettled	71000000	USD
CY2017Q3	tve	Reacquisitionpriceofleaseleasebackobligations Reacquisitionpriceofleaseleasebackobligations	74000000	USD
CY2016Q3	tve	Leasebackobligationsettledasaresultofacquisition Leasebackobligationsettledasaresultofacquisition	70000000	USD
CY2020	tve	Net Effect On Earnings NetEffectOnEarnings	0	USD
CY2020	tve	Net Effect On Earnings NetEffectOnEarnings	0	USD
CY2017Q4	tve	Net Effect On Earnings NetEffectOnEarnings	0	USD
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	000-52313
CY2020	dei	Entity Registrant Name EntityRegistrantName	TENNESSEE VALLEY AUTHORITY
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-0474417
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	400 W. Summit Hill Drive
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Knoxville
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37902 (Zip Code)
CY2020	dei	City Area Code CityAreaCode	(865)
CY2020	dei	Local Phone Number LocalPhoneNumber	632-2101
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020	tve	Electricrevenue Electricrevenue	10104000000	USD
CY2019	tve	Electricrevenue Electricrevenue	11159000000	USD
CY2018	tve	Electricrevenue Electricrevenue	11075000000	USD
CY2020	tve	Otherrevenue Otherrevenue	145000000	USD
CY2019	tve	Otherrevenue Otherrevenue	159000000	USD
CY2018	tve	Otherrevenue Otherrevenue	158000000	USD
CY2020	us-gaap	Revenues Revenues	10249000000	USD
CY2019	us-gaap	Revenues Revenues	11318000000	USD
CY2018	us-gaap	Revenues Revenues	11233000000	USD
CY2020	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	1584000000	USD
CY2019	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	1896000000	USD
CY2018	us-gaap	Utilities Operating Expense Fuel Used UtilitiesOperatingExpenseFuelUsed	2049000000	USD
CY2020	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	880000000	USD
CY2019	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	1007000000	USD
CY2018	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	973000000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2720000000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3090000000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2598000000	USD
CY2020	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1826000000	USD
CY2019	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1973000000	USD
CY2018	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	2527000000	USD
CY2020	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	528000000	USD
CY2019	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	541000000	USD
CY2018	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	518000000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	7538000000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	8507000000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	8665000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2711000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	2811000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	2568000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	36000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	62000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	50000000	USD
CY2020	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	253000000	USD
CY2019	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	258000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1352000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1417000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1119000000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	500000000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	299000000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1529000000	USD
CY2018	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	256000000	USD
CY2020	us-gaap	Interest And Debt Expense InterestAndDebtExpense	1142000000	USD
CY2019	us-gaap	Interest And Debt Expense InterestAndDebtExpense	1198000000	USD
CY2018	us-gaap	Interest And Debt Expense InterestAndDebtExpense	1243000000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1739000000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	1003000000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	999000000	USD
CY2020Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	130000000	USD
CY2019Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	156000000	USD
CY2020Q3	us-gaap	Other Assets Current OtherAssetsCurrent	84000000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	3246000000	USD
CY2019Q3	us-gaap	Other Assets Current OtherAssetsCurrent	85000000	USD
CY2020Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	2139000000	USD
CY2019Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	1893000000	USD
CY2020Q3	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	1504000000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	3278000000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	64970000000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	62944000000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33550000000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	31384000000	USD
CY2020Q3	tve	Net Completed Plant NetCompletedPlant	31420000000	USD
CY2019Q3	tve	Net Completed Plant NetCompletedPlant	31560000000	USD
CY2019Q3	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	1534000000	USD
CY2020Q3	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	516000000	USD
CY2019Q3	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	146000000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35579000000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35133000000	USD
CY2020Q3	us-gaap	Long Term Investments LongTermInvestments	3198000000	USD
CY2019Q3	us-gaap	Long Term Investments LongTermInvestments	2968000000	USD
CY2020Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	10245000000	USD
CY2019Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8763000000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	232000000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	325000000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	325000000	USD
CY2020Q3	us-gaap	Regulated Entity Other Assets Noncurrent RegulatedEntityOtherAssetsNoncurrent	10802000000	USD
CY2019Q3	us-gaap	Regulated Entity Other Assets Noncurrent RegulatedEntityOtherAssetsNoncurrent	9088000000	USD
CY2020Q3	us-gaap	Assets Assets	52825000000	USD
CY2019Q3	us-gaap	Assets Assets	50467000000	USD
CY2020Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1844000000	USD
CY2019Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1649000000	USD
CY2020Q3	us-gaap	Interest Payable Current InterestPayableCurrent	298000000	USD
CY2019Q3	us-gaap	Interest Payable Current InterestPayableCurrent	296000000	USD
CY2020Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	345000000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	163000000	USD
CY2020Q3	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	198000000	USD
CY2019Q3	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	40000000	USD
CY2020Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	141000000	USD
CY2019Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	150000000	USD
CY2020Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	57000000	USD
CY2019Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	922000000	USD
CY2020Q3	us-gaap	Unsecured Debt Current UnsecuredDebtCurrent	1787000000	USD
CY2019Q3	us-gaap	Unsecured Debt Current UnsecuredDebtCurrent	1030000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	41000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	39000000	USD
CY2020Q3	us-gaap	Notes Payable Current NotesPayableCurrent	0	USD
CY2019Q3	us-gaap	Notes Payable Current NotesPayableCurrent	23000000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	4711000000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	4312000000	USD
CY2020Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	6617000000	USD
CY2019Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	6181000000	USD
CY2020Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	6440000000	USD
CY2019Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	5453000000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	525000000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	182000000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2548000000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2308000000	USD
CY2020Q3	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	25000000	USD
CY2019Q3	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	223000000	USD
CY2020Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	23000000	USD
CY2019Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	0	USD
CY2020Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	16178000000	USD
CY2019Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	14347000000	USD
CY2020Q3	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	17956000000	USD
CY2019Q3	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	19094000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1048000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1089000000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	19004000000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	20183000000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	39893000000	USD
CY2019Q3	us-gaap	Liabilities Liabilities	38842000000	USD
CY2020Q3	tve	Appropriation Investment Power Program AppropriationInvestmentPowerProgram	258000000	USD
CY2019Q3	tve	Appropriation Investment Power Program AppropriationInvestmentPowerProgram	258000000	USD
CY2020Q3	tve	Retained Earnings Power Program RetainedEarningsPowerProgram	12177000000	USD
CY2019Q3	tve	Retained Earnings Power Program RetainedEarningsPowerProgram	10823000000	USD
CY2020Q3	tve	Total Power Program Proprietary Capital TotalPowerProgramProprietaryCapital	12435000000	USD
CY2019Q3	tve	Total Power Program Proprietary Capital TotalPowerProgramProprietaryCapital	11081000000	USD
CY2020Q3	tve	Appropriation Investment Nonpower Programs Net AppropriationInvestmentNonpowerProgramsNet	548000000	USD
CY2019Q3	tve	Appropriation Investment Nonpower Programs Net AppropriationInvestmentNonpowerProgramsNet	556000000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-51000000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12000000	USD
CY2020Q3	tve	Proprietary Capital ProprietaryCapital	12932000000	USD
CY2019Q3	tve	Proprietary Capital ProprietaryCapital	11625000000	USD
CY2020Q3	tve	Liabilities And Proprietary Capital LiabilitiesAndProprietaryCapital	52825000000	USD
CY2019Q3	tve	Liabilities And Proprietary Capital LiabilitiesAndProprietaryCapital	50467000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1352000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1417000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1119000000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-114000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	10000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-38000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-45000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-26000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-39000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-69000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	36000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1313000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1348000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1155000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1352000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1417000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1119000000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1848000000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1993000000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2554000000	USD
CY2020	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	388000000	USD
CY2019	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	379000000	USD
CY2018	us-gaap	Amortization Of Nuclear Fuel Lease AmortizationOfNuclearFuelLease	382000000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	324000000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	314000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	324000000	USD
CY2020	us-gaap	Recognition Of Deferred Revenue RecognitionOfDeferredRevenue	0	USD
CY2019	us-gaap	Recognition Of Deferred Revenue RecognitionOfDeferredRevenue	10000000	USD
CY2019	us-gaap	Payments For Proceeds From Nuclear Fuel PaymentsForProceedsFromNuclearFuel	474000000	USD
CY2018	us-gaap	Recognition Of Deferred Revenue RecognitionOfDeferredRevenue	100000000	USD
CY2020	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	23000000	USD
CY2019	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	261000000	USD
CY2018	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	2000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-259000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	40000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	68000000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	12000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	87000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-65000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-38000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-155000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	143000000	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1000000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-8000000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-36000000	USD
CY2018	us-gaap	Payments For Proceeds From Nuclear Fuel PaymentsForProceedsFromNuclearFuel	457000000	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	49000000	USD
CY2020	us-gaap	Pension Contributions PensionContributions	305000000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	307000000	USD
CY2018	us-gaap	Pension Contributions PensionContributions	304000000	USD
CY2020	tve	Settlementof Asset Retirement Obligations Through Cash Payments SettlementofAssetRetirementObligationsThroughCashPayments	114000000	USD
CY2019	tve	Settlementof Asset Retirement Obligations Through Cash Payments SettlementofAssetRetirementObligationsThroughCashPayments	89000000	USD
CY2018	tve	Settlementof Asset Retirement Obligations Through Cash Payments SettlementofAssetRetirementObligationsThroughCashPayments	106000000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	44000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-52000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	37000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3636000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3720000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3938000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1643000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1700000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1759000000	USD
CY2020	us-gaap	Payments For Proceeds From Nuclear Fuel PaymentsForProceedsFromNuclearFuel	342000000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	48000000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	49000000	USD
CY2020	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	8000000	USD
CY2019	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	10000000	USD
CY2018	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	12000000	USD
CY2020	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	7000000	USD
CY2019	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	11000000	USD
CY2018	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	4000000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-20000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	22000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2015000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2243000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2269000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	997000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-865000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	998000000	USD
CY2020	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1427000000	USD
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1035000000	USD
CY2018	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1731000000	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	39000000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	38000000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	36000000	USD
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	23000000	USD
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	46000000	USD
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	53000000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-294000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-782000000	USD
CY2020	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	55000000	USD
CY2019	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	43000000	USD
CY2018	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	42000000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4000000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3000000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-21000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1422000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1477000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1658000000	USD
CY2020	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	199000000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	0	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	11000000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	322000000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	322000000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	311000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	521000000	USD
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0245
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	322000000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	322000000	USD
CY2017Q3	tve	Balance Balance	9133000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1119000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	36000000	USD
CY2018	tve	Return On Appropriation Investment ReturnOnAppropriationInvestment	5000000	USD
CY2018Q3	tve	Balance Balance	10283000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1417000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-69000000	USD
CY2019	tve	Return On Appropriation Investment ReturnOnAppropriationInvestment	6000000	USD
CY2019Q3	tve	Balance Balance	11625000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1352000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-39000000	USD
CY2020	tve	Return On Appropriation Investment ReturnOnAppropriationInvestment	6000000	USD
CY2020Q3	tve	Balance Balance	12932000000	USD
CY2020Q3	tve	Population Of Service Area PopulationOfServiceArea	10000000	People
CY2015Q3	tve	Appropriation Investment Power Program AppropriationInvestmentPowerProgram	1000000000.0	USD
CY2020	us-gaap	Fiscal Period FiscalPeriod	<div style="padding-left:18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Fiscal Year</span></div><div><span><br/></span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">TVA's fiscal year ends September 30. Years (2020, 2019, etc.) refer to TVA's fiscal years unless they are preceded by "CY," in which case the references are to calendar years.</span></div>
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-indent:18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Use of Estimates</span></div><div style="text-indent:18pt"><span><br/></span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The preparation of financial statements requires TVA to estimate the effects of various matters that are inherently uncertain as of the date of the consolidated financial statements. Although the consolidated financial statements are prepared in conformity with GAAP, TVA is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the amounts of revenues and expenses, including impacts from the COVID-19 pandemic, reported during the reporting period. Each of these estimates varies in regard to the level of judgment involved and its potential impact on TVA's financial results. Estimates are considered critical either when a different estimate could have reasonably been used, or where changes in the estimate are reasonably likely to occur from period to period, and such use or change would materially impact TVA's financial condition, results of operations, or cash flows.</span></div>
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Reclassifications<span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Certain historical amounts have been reclassified in the accompanying consolidated financial statements to the current presentation. </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span>In the Consolidated Balance Sheet at September 30, 2019, TVA reclassified $163 million from Accounts payable and accrued liabilities to Asset retirement obligations in Current liabilities. In addition, as a result of the adoption of the new lease accounting standard effective for TVA October 1, 2019, TVA reclassified $182 million from Other long-term liabilities to Finance lease liabilities in the Consolidated Balance Sheet at September 30, 2019.
CY2019Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	163000000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	182000000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	500000000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	299000000	USD
CY2020Q3	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	21000000	USD
CY2019Q3	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	23000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	521000000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	322000000	USD
CY2019	tve	Amortizationof Reacquired Rights AmortizationofReacquiredRights	8000000	USD
CY2018	tve	Amortizationof Reacquired Rights AmortizationofReacquiredRights	8000000	USD
CY2020	tve	Periodoftimeforcustomerstofulfillpaymentarrangements Periodoftimeforcustomerstofulfillpaymentarrangements	90 days
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1000000	USD
CY2019Q3	us-gaap	Allowance For Notes And Loans Receivable Noncurrent AllowanceForNotesAndLoansReceivableNoncurrent	1000000	USD
CY2018	tve	Revenue Capitalized During Pre Commercial Operations RevenueCapitalizedDuringPreCommercialOperations	11000000	USD
CY2019	tve	Fuel Cost Capitalized During Pre Commercial Operations FuelCostCapitalizedDuringPreCommercialOperations	19000000	USD
CY2020Q3	tve	Reacquired Rights ReacquiredRights	192000000	USD
CY2019Q3	tve	Reacquired Rights ReacquiredRights	200000000	USD
CY2020	tve	Amortizationof Reacquired Rights AmortizationofReacquiredRights	8000000	USD
CY2020	tve	Amortizationperiod Amortizationperiod	seven years
CY2020Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	54000000	USD
CY2020Q3	tve	Recorded Cost For Emission Allowances Granted By Environmental Protection Agency RecordedCostForEmissionAllowancesGrantedByEnvironmentalProtectionAgency	0	USD
CY2020	us-gaap	Depreciation Depreciation	1600000000	USD
CY2019	us-gaap	Depreciation Depreciation	1800000000	USD
CY2018	us-gaap	Depreciation Depreciation	1300000000	USD
CY2020	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0274
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0309
CY2020	tve	Accelerateddepreciation Accelerateddepreciation	387000000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	566000000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	48000000	USD
CY2019Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	63000000	USD
CY2020	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	42000000	USD
CY2019	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	38000000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	32000000	USD
CY2020Q3	tve	Finance Lease Under Ppa FinanceLeaseUnderPPA	500000000	USD
CY2020Q3	tve	Operating Lease Under Ppa OperatingLeaseUnderPPA	174000000	USD
CY2020	tve	Reimbursementsfrom Doe ReimbursementsfromDOE	89000000	USD
CY2020Q3	tve	Accountsreceivablefrom Doe AccountsreceivablefromDOE	6000000	USD
CY2004	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1500000000	USD
CY2004	tve	Prepayment Period PrepaymentPeriod	180 months
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	64970000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	205000000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	210000000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33550000000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1401000000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1624000000	USD
CY2020Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	128000000	USD
CY2019Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	115000000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1529000000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1739000000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1000000	USD
CY2020Q3	tve	Available Credit On Public Power Support And Stabilization Program AvailableCreditOnPublicPowerSupportAndStabilizationProgram	1000000000.0	USD
CY2020Q3	tve	Subsequent Credit On Public Power Support And Stabilization Program SubsequentCreditOnPublicPowerSupportAndStabilizationProgram	1000000	USD
CY2020Q3	tve	Net Completed Plant NetCompletedPlant	31420000000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	62944000000	USD
CY2020Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	770000000	USD
CY2019Q3	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	742000000	USD
CY2020Q3	us-gaap	Energy Related Inventory EnergyRelatedInventory	253000000	USD
CY2019Q3	us-gaap	Energy Related Inventory EnergyRelatedInventory	294000000	USD
CY2020Q3	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	15000000	USD
CY2019Q3	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	16000000	USD
CY2020Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	35000000	USD
CY2019Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	53000000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	1003000000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	999000000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	31384000000	USD
CY2019Q3	tve	Net Completed Plant NetCompletedPlant	31560000000	USD
CY2020Q3	tve	Revisions To Asset Retirement Costs RevisionsToAssetRetirementCosts	1100000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	87000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	86000000	USD
CY2020Q3	tve	Finance Lease Liability Payment Amounts Representing Interest FinanceLeaseLiabilityPaymentAmountsRepresentingInterest	-476000000	USD
CY2020Q3	tve	Finance Present Value Of Net Minimum Lease Payments FinancePresentValueOfNetMinimumLeasePayments	566000000	USD
CY2020	tve	Change In Plant Decommissioning Obligations ChangeInPlantDecommissioningObligations	19000000	USD
CY2020	tve	Accelerateddepreciation Accelerateddepreciation	387000000	USD
CY2019	tve	Accelerateddepreciation Accelerateddepreciation	566000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	205000000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	210000000	USD
CY2020	us-gaap	Lease Cost LeaseCost	214000000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	97000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	92000000	USD
CY2020Q3	tve	Finance Lease Liability Payments Due Thereafter FinanceLeaseLiabilityPaymentsDueThereafter	592000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1042000000	USD
CY2020Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3000000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	232000000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	516000000	USD
CY2020Q3	tve	Total Lease Assets TotalLeaseAssets	748000000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	171000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	525000000	USD
CY2020Q3	tve	Total Lease Liabilities TotalLeaseLiabilities	800000000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	84000000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	75000000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	7000000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	15000000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	33000000	USD
CY2020	tve	Total Finance Lease Costs TotalFinanceLeaseCosts	48000000	USD
CY2020	tve	Operating Cash Flows For Operating Leases OperatingCashFlowsForOperatingLeases	85000000	USD
CY2020	tve	Operating Cash Flows For Finance Leases OperatingCashFlowsForFinanceLeases	33000000	USD
CY2020	tve	Financing Cash Flows For Finance Leases FinancingCashFlowsForFinanceLeases	15000000	USD
CY2020	tve	Lease Assets Obtained In Exchange For Lease Obligations Operating LeaseAssetsObtainedInExchangeForLeaseObligationsOperating	110000000	USD
CY2020	tve	Lease Assets Obtained In Exchange For Lease Obligations Finance LeaseAssetsObtainedInExchangeForLeaseObligationsFinance	394000000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P12Y
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.016
CY2020Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.218
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	66000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	51000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	39000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	37000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	34000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	16000000	USD
CY2020Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	243000000	USD
CY2020Q3	tve	Present Value Of Future Minimum Lease Payments Operating PresentValueOfFutureMinimumLeasePaymentsOperating	-9000000	USD
CY2020Q3	tve	Operating Present Value Of Net Minimum Lease Payments OperatingPresentValueOfNetMinimumLeasePayments	234000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	92000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	93000000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	92000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	76000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	75000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	60000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	12000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	2000000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	228000000	USD
CY2019Q3	tve	Present Value Of Future Minimum Lease Payments Operating PresentValueOfFutureMinimumLeasePaymentsOperating	0	USD
CY2019Q3	tve	Operating Present Value Of Net Minimum Lease Payments OperatingPresentValueOfNetMinimumLeasePayments	228000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	53000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	53000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	53000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	55000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	51000000	USD
CY2019Q3	tve	Finance Lease Liability Payments Due Thereafter FinanceLeaseLiabilityPaymentsDueThereafter	418000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	683000000	USD
CY2019Q3	tve	Finance Lease Liability Payment Amounts Representing Interest FinanceLeaseLiabilityPaymentAmountsRepresentingInterest	-495000000	USD
CY2019Q3	tve	Finance Present Value Of Net Minimum Lease Payments FinancePresentValueOfNetMinimumLeasePayments	188000000	USD
CY2020Q3	tve	Purchased Power Lease Bess PurchasedPowerLeaseBESS	89000000	USD
CY2020Q3	us-gaap	Prepaid Expense Noncurrent PrepaidExpenseNoncurrent	42000000	USD
CY2019Q3	us-gaap	Prepaid Expense Noncurrent PrepaidExpenseNoncurrent	22000000	USD
CY2020Q3	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	21000000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	325000000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	325000000	USD
CY2019Q3	us-gaap	Prepaid Expense Noncurrent PrepaidExpenseNoncurrent	22000000	USD
CY2020Q3	tve	Impact On Secured Borrowings ImpactOnSecuredBorrowings	1000000	USD
CY2019Q3	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	5000000	USD
CY2020Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	130000000	USD
CY2019Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	156000000	USD
CY2020Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	10245000000	USD
CY2019Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	8763000000	USD
CY2020Q3	us-gaap	Regulatory Assets RegulatoryAssets	10375000000	USD
CY2019Q3	us-gaap	Regulatory Assets RegulatoryAssets	8919000000	USD
CY2020Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	141000000	USD
CY2019Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	150000000	USD
CY2020Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	23000000	USD
CY2019Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	0	USD
CY2020Q3	us-gaap	Regulatory Liabilities RegulatoryLiabilities	164000000	USD
CY2019Q3	us-gaap	Regulatory Liabilities RegulatoryLiabilities	150000000	USD
CY2019Q3	tve	Reclass Environmental Agreements To Other Reg Assets ReclassEnvironmentalAgreementsToOtherRegAssets	12000000	USD
CY2018	tve	Accelerated Amortizationof Deferred Nuclear Generating Unitsand Training Costs AcceleratedAmortizationofDeferredNuclearGeneratingUnitsandTrainingCosts	857000000	USD
CY2020	tve	Acceleratedrecoveryfor Kingstonashspill AcceleratedrecoveryforKingstonashspill	266000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1089000000	USD
CY2020Q3	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	40000000	USD
CY2020Q3	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	40000000	USD
CY2020Q3	tve	Financialinstrumentssubjecttomandatoryredemptioninterestratestatedpercentage Financialinstrumentssubjecttomandatoryredemptioninterestratestatedpercentage	0.070
CY2020Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	10000000	USD
CY2019Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	11000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	41000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	39000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1048000000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2548000000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2308000000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	182000000	USD
CY2020Q3	tve	Changeininterestrateswapliabilities Changeininterestrateswapliabilities	277000000	USD
CY2020Q3	tve	Deferral Of Energy Right Laons DeferralOfEnergyRightLaons	1000000	USD
CY2019Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	1000000	USD
CY2020	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	1200000000	USD
CY2020	tve	Total Aro Change Due To Ccr TotalAROChangeDueToCCR	129000000	USD
CY2020	tve	Change In Aro From Operating Ccr Facilities ChangeInAROFromOperatingCCRFacilities	38000000	USD
CY2020	tve	Change In Aro From Inactive Ccr Facilities ChangeInAROFromInactiveCCRFacilities	91000000	USD
CY2020	tve	Allen West Ar Oincrease AllenWestAROincrease	273000000	USD
CY2020	tve	Gallatin Ccrar Oincreasedecrease GallatinCCRAROincreasedecrease	173000000	USD
CY2020	tve	Increase In Ccr Post Closure Care IncreaseInCCRPostClosureCare	460000000	USD
CY2019	tve	Costsforasbestos Costsforasbestos	114000000	USD
CY2019	tve	Allen West Ar Oincrease AllenWestAROincrease	33000000	USD
CY2019	tve	Paradise Ar Oincreasedecrease ParadiseAROincreasedecrease	57000000	USD
CY2019	tve	Allen East Ar Oincreasedecrease AllenEastAROincreasedecrease	44000000	USD
CY2019	tve	Gallatin Ccrar Oincreasedecrease GallatinCCRAROincreasedecrease	672000000	USD
CY2020	us-gaap	Amortization And Depreciation Of Decontaminating And Decommissioning Assets AmortizationAndDepreciationOfDecontaminatingAndDecommissioningAssets	169000000	USD
CY2019	us-gaap	Amortization And Depreciation Of Decontaminating And Decommissioning Assets AmortizationAndDepreciationOfDecontaminatingAndDecommissioningAssets	144000000	USD
CY2018	us-gaap	Amortization And Depreciation Of Decontaminating And Decommissioning Assets AmortizationAndDepreciationOfDecontaminatingAndDecommissioningAssets	144000000	USD
CY2018Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4779000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	89000000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	50000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	18000000	USD
CY2019	tve	Gallatin Ccr GallatinCCR	672000000	USD
CY2019	tve	Accretion Recorded As Regulatory Asset AccretionRecordedAsRegulatoryAsset	186000000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5616000000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	114000000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1077000000	USD
CY2020	tve	Accretion Recorded As Regulatory Asset AccretionRecordedAsRegulatoryAsset	206000000	USD
CY2020Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	6785000000	USD
CY2020Q3	tve	Debt Ceiling DebtCeiling	30000000000.0	USD
CY2013Q3	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	40000000	USD
CY2012Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	100000000	USD
CY2012Q1	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.071
CY2020Q3	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Costs BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCosts	78000000	USD
CY2017Q3	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Costs BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCosts	74000000	USD
CY2020	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1427000000	USD
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	1035000000	USD
CY2020Q3	tve	Shortterm Borrowings Gross ShorttermBorrowingsGross	57000000	USD
CY2019Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	922000000	USD
CY2018Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	1217000000	USD
CY2020Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0006
CY2019Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0215
CY2018Q3	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0205
CY2019Q3	tve	Amount Of Redeemable Bond Issues Outstanding AmountOfRedeemableBondIssuesOutstanding	357000000	USD
CY2019Q3	tve	Call Price Percent CallPricePercent	100
CY2019Q3	tve	Bond Issues With Survivors Option BondIssuesWithSurvivorsOption	217000000	Units
CY2019Q3	tve	Bond Issues With Survivors Option BondIssuesWithSurvivorsOption	217000000	Units
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-3000000	USD
CY2019Q3	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	0	USD
CY2020Q2	tve	Percent Of Par Value PercentOfParValue	0.997
CY2020Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	57000000	USD
CY2019Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	922000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	41000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	39000000	USD
CY2020Q3	us-gaap	Notes Payable Current NotesPayableCurrent	0	USD
CY2019Q3	us-gaap	Notes Payable Current NotesPayableCurrent	23000000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	1787000000	USD
CY2019Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	1030000000	USD
CY2020Q3	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	1885000000	USD
CY2019Q3	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	2014000000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Before Tax ForeignCurrencyTransactionGainBeforeTax	73000000	USD
CY2020Q3	tve	Long Term Power Bonds LongTermPowerBonds	18078000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-45000000	USD
CY2019Q3	tve	Long Term Power Bonds LongTermPowerBonds	19225000000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-122000000	USD
CY2019Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-131000000	USD
CY2020Q3	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	17956000000	USD
CY2019Q3	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	19094000000	USD
CY2020Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1048000000	USD
CY2019Q3	us-gaap	Other Long Term Debt Noncurrent OtherLongTermDebtNoncurrent	1089000000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	19004000000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	20183000000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	80000000	USD
CY2019Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	191000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1901000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1071000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	69000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1058000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1059000000	USD
CY2020Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	15957000000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	21115000000	USD
CY2020Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	57000000	USD
CY2021Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2022Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2023Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2024Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2026Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2020Q3	us-gaap	Debt Default Shortterm Debt Amount DebtDefaultShorttermDebtAmount	57000000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	153000000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	77000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-38000000	USD
CY2020Q3	tve	Ct And Qte Outstanding Leaseback Obligation CtAndQteOutstandingLeasebackObligation	223000000	USD
CY2019Q3	tve	Ct And Qte Outstanding Leaseback Obligation CtAndQteOutstandingLeasebackObligation	263000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-38000000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-114000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-45000000	USD
CY2020	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	0	USD
CY2020	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	27000000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2020Q3	tve	Number Of British Pound Streling Denominated Bond Transactions NumberOfBritishPoundStrelingDenominatedBondTransactions	3	Bond_issues
CY2020	tve	Changein Unrealizedgainslosseson Interest Rate Derivatives ChangeinUnrealizedgainslossesonInterestRateDerivatives	272000000	USD
CY2019	tve	Changein Unrealizedgainslosseson Interest Rate Derivatives ChangeinUnrealizedgainslossesonInterestRateDerivatives	-565000000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	2250000000	USD
CY2020Q3	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	3000000	USD
CY2019Q3	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	53000000	USD
CY2020Q3	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	2253000000	USD
CY2019Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	2025000000	USD
CY2020Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	22000000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1400000000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	1600000000	USD
CY2020Q3	us-gaap	Long Term Investments LongTermInvestments	3200000000	USD
CY2020Q3	tve	Nuclear Decommissioning Fund Investments Fair Value NuclearDecommissioningFundInvestmentsFairValue	2200000000	USD
CY2020Q3	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	866000000	USD
CY2020	tve	Periodoftimewheretheinvestorcontributescapitaltoaninvestmentinaprivatepartnershipminimum Periodoftimewheretheinvestorcontributescapitaltoaninvestmentinaprivatepartnershipminimum	three
CY2020	tve	Periodoftimewheretheinvestorcontributescapitaltoaninvestmentinaprivatepartnershipmaximum Periodoftimewheretheinvestorcontributescapitaltoaninvestmentinaprivatepartnershipmaximum	four
CY2020	tve	Minimuminvestmentperiod Minimuminvestmentperiod	10 years
CY2020Q3	tve	Number Of Readily Available Quoted Exchange Prices For Investments NumberOfReadilyAvailableQuotedExchangePricesForInvestments	0
CY2020	tve	Increase In Ndt IncreaseInNDT	123000000	USD
CY2020Q3	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	1000000	USD
CY2020Q3	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	1000000	USD
CY2020Q3	us-gaap	Trading Securities Equity TradingSecuritiesEquity	500000000	USD
CY2020Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	525000000	USD
CY2020Q3	us-gaap	Financial Instruments Owned Corporate Debt At Fair Value FinancialInstrumentsOwnedCorporateDebtAtFairValue	356000000	USD
CY2020Q3	tve	Financial Instruments Owned Mortgages Residential Mortgagebackedand Assetbacked Securitiesat Fair Value FinancialInstrumentsOwnedMortgagesResidentialMortgagebackedandAssetbackedSecuritiesatFairValue	27000000	USD
CY2020Q3	tve	Institutionalmutualfunds Institutionalmutualfunds	188000000	USD
CY2020Q3	tve	Forward Contract Derivative Assetat Fair Value ForwardContractDerivativeAssetatFairValue	13000000	USD
CY2020Q3	tve	Privatepartnershipsmeasuredatnetassetvalue Privatepartnershipsmeasuredatnetassetvalue	194000000	USD
CY2020Q3	tve	Privaterealestatemeasuredatnetassetvalue Privaterealestatemeasuredatnetassetvalue	168000000	USD
CY2020Q3	tve	Privatecreditmeasuredatnetassetvalue Privatecreditmeasuredatnetassetvalue	53000000	USD
CY2020Q3	tve	Commingledfundsmeasuredatnetassetvalue Commingledfundsmeasuredatnetassetvalue	1174000000	USD
CY2020Q3	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	3198000000	USD
CY2020Q3	us-gaap	Financial Instruments Owned Physical Commodities At Fair Value FinancialInstrumentsOwnedPhysicalCommoditiesAtFairValue	49000000	USD
CY2020Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	3247000000	USD
CY2020Q3	us-gaap	Foreign Currency Contracts Liability Fair Value Disclosure ForeignCurrencyContractsLiabilityFairValueDisclosure	209000000	USD
CY2020Q3	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	2041000000	USD
CY2020Q3	tve	Commoditycontractderivativeliabilitiesfairvaluedisclosure Commoditycontractderivativeliabilitiesfairvaluedisclosure	3000000	USD
CY2020Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	2253000000	USD
CY2019Q3	us-gaap	Trading Securities Equity TradingSecuritiesEquity	464000000	USD
CY2019Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	344000000	USD
CY2019Q3	us-gaap	Financial Instruments Owned Corporate Debt At Fair Value FinancialInstrumentsOwnedCorporateDebtAtFairValue	417000000	USD
CY2019Q3	tve	Financial Instruments Owned Mortgages Residential Mortgagebackedand Assetbacked Securitiesat Fair Value FinancialInstrumentsOwnedMortgagesResidentialMortgagebackedandAssetbackedSecuritiesatFairValue	32000000	USD
CY2019Q3	tve	Institutionalmutualfunds Institutionalmutualfunds	250000000	USD
CY2019Q3	tve	Forward Contract Derivative Assetat Fair Value ForwardContractDerivativeAssetatFairValue	22000000	USD
CY2019Q3	tve	Privatepartnershipsmeasuredatnetassetvalue Privatepartnershipsmeasuredatnetassetvalue	140000000	USD
CY2019Q3	tve	Privaterealestatemeasuredatnetassetvalue Privaterealestatemeasuredatnetassetvalue	135000000	USD
CY2019Q3	tve	Privatecreditmeasuredatnetassetvalue Privatecreditmeasuredatnetassetvalue	33000000	USD
CY2019Q3	tve	Commingledfundsmeasuredatnetassetvalue Commingledfundsmeasuredatnetassetvalue	1131000000	USD
CY2019Q3	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	2968000000	USD
CY2019Q3	us-gaap	Financial Instruments Owned Physical Commodities At Fair Value FinancialInstrumentsOwnedPhysicalCommoditiesAtFairValue	12000000	USD
CY2019Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	2980000000	USD
CY2019Q3	us-gaap	Foreign Currency Contracts Liability Fair Value Disclosure ForeignCurrencyContractsLiabilityFairValueDisclosure	208000000	USD
CY2019Q3	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	1764000000	USD
CY2019Q3	tve	Commoditycontractderivativeliabilitiesfairvaluedisclosure Commoditycontractderivativeliabilitiesfairvaluedisclosure	53000000	USD
CY2019Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	2025000000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	-1000000	USD
CY2020Q3	us-gaap	Transfers Accounted For As Secured Borrowings Assets Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount	86000000	USD
CY2019Q3	us-gaap	Transfers Accounted For As Secured Borrowings Assets Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount	100000000	USD
CY2020Q3	us-gaap	Notes Receivable Net NotesReceivableNet	93000000	USD
CY2019Q3	us-gaap	Notes Receivable Net NotesReceivableNet	120000000	USD
CY2020Q3	us-gaap	Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount	108000000	USD
CY2019Q3	us-gaap	Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount	126000000	USD
CY2020Q3	tve	Unfunded Loan Commitments UnfundedLoanCommitments	2000000	USD
CY2019Q3	tve	Unfunded Loan Commitments UnfundedLoanCommitments	10000000	USD
CY2020Q3	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	35000000	USD
CY2019Q3	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount SharesSubjectToMandatoryRedemptionSettlementTermsAmount	37000000	USD
CY2020Q3	us-gaap	Unsecured Debt UnsecuredDebt	26630000000	USD
CY2019Q3	us-gaap	Unsecured Debt UnsecuredDebt	26059000000	USD
CY2020Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	1419000000	USD
CY2019Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	1371000000	USD
CY2020Q3	us-gaap	Notes Payable NotesPayable	0	USD
CY2019Q3	us-gaap	Notes Payable NotesPayable	23000000	USD
CY2020	tve	Percent Of Sales Of Electricity To Lp Cs PercentOfSalesOfElectricityToLPCs	0.93
CY2020	tve	Electricrevenue Electricrevenue	10100000000	USD
CY2020	tve	Salesof Electricitysubtotal SalesofElectricitysubtotal	10100000000	USD
CY2019	tve	Salesof Electricitysubtotal SalesofElectricitysubtotal	11155000000	USD
CY2018	tve	Salesof Electricitysubtotal SalesofElectricitysubtotal	11079000000	USD
CY2020	tve	Offsystemsales Offsystemsales	4000000	USD
CY2019	tve	Offsystemsales Offsystemsales	4000000	USD
CY2018	tve	Offsystemsales Offsystemsales	7000000	USD
CY2020	tve	Revenue Capitalized During Pre Commercial Operations RevenueCapitalizedDuringPreCommercialOperations	0	USD
CY2019	tve	Revenue Capitalized During Pre Commercial Operations RevenueCapitalizedDuringPreCommercialOperations	0	USD
CY2018	tve	Revenue Capitalized During Pre Commercial Operations RevenueCapitalizedDuringPreCommercialOperations	11000000	USD
CY2020	tve	Electricrevenue Electricrevenue	10104000000	USD
CY2019	tve	Electricrevenue Electricrevenue	11159000000	USD
CY2018	tve	Electricrevenue Electricrevenue	11075000000	USD
CY2020	tve	Otherrevenue Otherrevenue	145000000	USD
CY2019	tve	Otherrevenue Otherrevenue	159000000	USD
CY2018	tve	Otherrevenue Otherrevenue	158000000	USD
CY2020	us-gaap	Revenues Revenues	10249000000	USD
CY2019	us-gaap	Revenues Revenues	11318000000	USD
CY2018	us-gaap	Revenues Revenues	11233000000	USD
CY2020	tve	Electricrevenue Electricrevenue	10104000000	USD
CY2019	tve	Electricrevenue Electricrevenue	11159000000	USD
CY2018	tve	Electricrevenue Electricrevenue	11075000000	USD
CY2020	tve	Otherrevenue Otherrevenue	145000000	USD
CY2019	tve	Otherrevenue Otherrevenue	159000000	USD
CY2018	tve	Otherrevenue Otherrevenue	158000000	USD
CY2020	us-gaap	Revenues Revenues	10249000000	USD
CY2019	us-gaap	Revenues Revenues	11318000000	USD
CY2018	us-gaap	Revenues Revenues	11233000000	USD
CY2020	tve	Bill Credits For Lta BillCreditsForLTA	-163000000	USD
CY2019	tve	Bill Credits For Lta BillCreditsForLTA	-14000000	USD
CY2018	tve	Bill Credits For Lta BillCreditsForLTA	0	USD
CY2020Q3	tve	Number Of Lp Cs Signed Lta NumberOfLPCsSignedLTA	142	Units
CY2020Q3	tve	Number Of Lp Cs Signed Flexibility Agreement NumberOfLPCsSignedFlexibilityAgreement	64	Units
CY2021	tve	Pandemic Relief Credit PandemicReliefCredit	200000000	USD
CY2020Q3	tve	Number Of Lp Cs Signed Lta NumberOfLPCsSignedLTA	142	Units
CY2020Q3	tve	Total Number Of Lp Cs TotalNumberOfLPCs	153	Units
CY2020	tve	Percentage Of Total Operating Revenues PercentageOfTotalOperatingRevenues	0.918
CY2020Q3	tve	Total Number Of Lp Cs TotalNumberOfLPCs	153	Units
CY2020	tve	Mlg Wsofoperatingrevenues MLGWsofoperatingrevenues	0.09
CY2020	tve	Ne Ssofoperatingrevenues NESsofoperatingrevenues	0.08
CY2004	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1500000000	USD
CY2004	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1500000000	USD
CY2020	tve	Energy Prepayment Discount EnergyPrepaymentDiscount	4000000	USD
CY2019	tve	Energy Prepayment Discount EnergyPrepaymentDiscount	46000000	USD
CY2020	us-gaap	Revenue Recognition Incentives RevenueRecognitionIncentives	<span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Economic Development Incentives. </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Under certain economic development programs TVA offers incentives to existing and potential power customers in targeted business sectors that make multi-year commitments to invest in the Tennessee Valley. TVA records those incentives as reductions of revenue. In 2020 and 2019, TVA recorded a total of $318 million and $310 million, respectively, in incentives as a reduction of revenue. Incentives that have been approved but have not been paid are recorded in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. At September 30, 2020 and 2019, the outstanding unpaid incentives were $172 million and $157 million, respectively. Incentives that have been paid out may be subject to claw back if the customer fails to meet certain program requirements. Additionally, in May 2020, TVA established flexibility provisions to support the continued operations and recovery of participating customers experiencing financial and operational hardships as a result of the COVID-19 pandemic and corresponding economic downturn. These provisions have not had a material impact to TVA.</span>
CY2020	tve	Economicincentives Economicincentives	318000000	USD
CY2019	tve	Economicincentives Economicincentives	310000000	USD
CY2020	tve	Unpaideconomicincentives Unpaideconomicincentives	172000000	USD
CY2019	tve	Unpaideconomicincentives Unpaideconomicincentives	157000000	USD
CY2020Q3	tve	Amount Of Appropriation Investment That Must Be Repaid AmountOfAppropriationInvestmentThatMustBeRepaid	1000000000.0	USD
CY2020Q3	tve	Amount Of Appropriation Investment That Must Be Repaid AmountOfAppropriationInvestmentThatMustBeRepaid	1000000000.0	USD
CY2020Q3	tve	Remaining Appropriation Investment RemainingAppropriationInvestment	258000000	USD
CY2020Q3	tve	Computed Average Interest Rate Payable ComputedAverageInterestRatePayable	0.0244
CY2019Q3	tve	Computed Average Interest Rate Payable ComputedAverageInterestRatePayable	0.0237
CY2018Q3	tve	Computed Average Interest Rate Payable ComputedAverageInterestRatePayable	0.0209
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-114000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-38000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-45000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-26000000	USD
CY2020	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	27000000	USD
CY2020	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	0	USD
CY2019	us-gaap	Other Income OtherIncome	21000000	USD
CY2018	us-gaap	Other Income OtherIncome	0	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	18000000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	25000000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	23000000	USD
CY2020	tve	External Services ExternalServices	12000000	USD
CY2019	tve	External Services ExternalServices	13000000	USD
CY2018	tve	External Services ExternalServices	14000000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	9000000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	3000000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	6000000	USD
CY2020	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-3000000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	0	USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	7000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	36000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	62000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	50000000	USD
CY2020	tve	Changeinotherincomeexpense Changeinotherincomeexpense	-26000000	USD
CY2019	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	21000000	USD
CY2020	tve	Change In Interest Income ChangeInInterestIncome	7000000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	1100000000	USD
CY2020	us-gaap	Interest Paid InterestPaid	1100000000	USD
CY2019	us-gaap	Interest Paid InterestPaid	1200000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1200000000	USD
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	394000000	USD
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	10000000	USD
CY2020	tve	Non Cash Financing Activities NonCashFinancingActivities	80000000	USD
CY2020	tve	Non Cash Investing Activities NonCashInvestingActivities	73000000	USD
CY2020	tve	Fixed And Variable Fund Maximum Annual Contribution FixedAndVariableFundMaximumAnnualContribution	10000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	88000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	84000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	80000000	USD
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	92000000	USD
CY2020	tve	Amountrelatedtochangeinnumberofparticipants Amountrelatedtochangeinnumberofparticipants	7000000	USD
CY2020	tve	Defined Benefit Plan Amortization From Regulatory Assets Of Net Prior Service Cost Credit DefinedBenefitPlanAmortizationFromRegulatoryAssetsOfNetPriorServiceCostCredit	115000000	USD
CY2020	tve	Defined Benefit Plan Amortization From Regulatory Assets Of Net Gains Losses DefinedBenefitPlanAmortizationFromRegulatoryAssetsOfNetGainsLosses	459000000	USD
CY2020	tve	Defined Benefit Plan Amortization From Regulatory Assets Of Amounts Capitalized Due To Actions Of Regulatory DefinedBenefitPlanAmortizationFromRegulatoryAssetsOfAmountsCapitalizedDueToActionsOfRegulatory	28000000	USD
CY2020Q3	tve	Defined Benefit Plan Cost Of Living Adjustment Assumption DefinedBenefitPlanCostOfLivingAdjustmentAssumption	0.25
CY2020Q3	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2020Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2020Q3	tve	Fair Value Plan Assets Gross FairValuePlanAssetsGross	8368000000	USD
CY2020Q3	tve	Defined Benefit Plan Fair Value Of Plan Derivative Liabilities DefinedBenefitPlanFairValueOfPlanDerivativeLiabilities	135000000	USD
CY2020Q3	tve	Net Payables NetPayables	107000000	USD
CY2020Q3	tve	Payables For Collateral On Loaned Securities PayablesForCollateralOnLoanedSecurities	167000000	USD
CY2019Q3	tve	Fair Value Plan Assets Gross FairValuePlanAssetsGross	8472000000	USD
CY2019Q3	tve	Defined Benefit Plan Fair Value Of Plan Derivative Liabilities DefinedBenefitPlanFairValueOfPlanDerivativeLiabilities	136000000	USD
CY2019Q3	tve	Net Payables NetPayables	132000000	USD
CY2019Q3	tve	Payables For Collateral On Loaned Securities PayablesForCollateralOnLoanedSecurities	224000000	USD
CY2020	tve	Votingpercentagerequiredtodesolvepartnershipinprivateequity Votingpercentagerequiredtodesolvepartnershipinprivateequity	0.80
CY2019	tve	Private Equity Reclassed To Private Real Asset PrivateEquityReclassedToPrivateRealAsset	113000000	USD
CY2019	tve	Private Real Estate Reclassed To Private Real Asset PrivateRealEstateReclassedToPrivateRealAsset	546000000	USD
CY2020	us-gaap	Other Postretirement Benefits Payments OtherPostretirementBenefitsPayments	25000000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	5000000	USD
CY2019	us-gaap	Other Postretirement Benefits Payments OtherPostretirementBenefitsPayments	36000000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	4000000	USD
CY2021	tve	Expected Paymentfor Postretirement Benefits ExpectedPaymentforPostretirementBenefits	28000000	USD
CY2020	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0069
CY2020	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	45000000	USD
CY2019	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0168
CY2019	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	59000000	USD
CY2019Q3	us-gaap	Postemployment Benefits Liability Current And Noncurrent PostemploymentBenefitsLiabilityCurrentAndNoncurrent	419000000	USD
CY2018	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0305
CY2018	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	6000000	USD
CY2018Q3	us-gaap	Postemployment Benefits Liability Current And Noncurrent PostemploymentBenefitsLiabilityCurrentAndNoncurrent	339000000	USD
CY2020	tve	Payment Of Workers Compensation Claims PaymentOfWorkersCompensationClaims	74000000	USD
CY2019	tve	Payment Of Workers Compensation Claims PaymentOfWorkersCompensationClaims	39000000	USD
CY2021	tve	Payment Of Workers Compensation Claims PaymentOfWorkersCompensationClaims	32000000	USD
CY2019	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0168
CY2020	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0069
CY2018	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0305
CY2019	tve	Post Employment Benefits Assumptions Used Calculating Net Periodic Benefit Cost And Unpaid Benefit Obligation Discount Rate PostEmploymentBenefitsAssumptionsUsedCalculatingNetPeriodicBenefitCostAndUnpaidBenefitObligationDiscountRate	0.0168
CY2020Q3	tve	Megawatts Provided Under Power Purchase Obligations MegawattsProvidedUnderPowerPurchaseObligations	2384
CY2020	tve	Remainingtermsoftheagreementshighendofrange Remainingtermsoftheagreementshighendofrange	12 years
CY2020Q3	tve	Megawattsprovidedundertransmissionobligations Megawattsprovidedundertransmissionobligations	1450	Megawatts
CY2020	tve	Power Purchased Under Agreement PowerPurchasedUnderAgreement	202000000	USD
CY2019	tve	Power Purchased Under Agreement PowerPurchasedUnderAgreement	195000000	USD
CY2018	tve	Power Purchased Under Agreement PowerPurchasedUnderAgreement	188000000	USD
CY2020Q3	tve	Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinnexttwelvemonths Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinnexttwelvemonths	3000000	USD
CY2020Q3	tve	Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyeartwo Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyeartwo	3000000	USD
CY2020Q3	tve	Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearthree Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearthree	2000000	USD
CY2020Q3	tve	Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearfour Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearfour	1000000	USD
CY2020Q3	tve	Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearfive Minimumpaymentsonmembershipinterestssubjecttomandatoryredemptiondueinyearfive	1000000	USD
CY2020Q3	tve	Ct And Qte Outstanding Leaseback Obligation CtAndQteOutstandingLeasebackObligation	223000000	USD
CY2019Q3	tve	Ct And Qte Outstanding Leaseback Obligation CtAndQteOutstandingLeasebackObligation	263000000	USD
CY2020Q3	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	207000000	USD
CY2020Q3	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	25000000	USD
CY2020Q3	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	0	USD
CY2020Q3	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	0	USD
CY2020Q3	us-gaap	Other Commitment Due In Fifth Year OtherCommitmentDueInFifthYear	0	USD
CY2020Q3	us-gaap	Other Commitment Due After Fifth Year OtherCommitmentDueAfterFifthYear	0	USD
CY2020Q3	us-gaap	Other Commitment OtherCommitment	232000000	USD
CY2020Q3	tve	Unfundedloancommitmentdueinnexttwelvemonths Unfundedloancommitmentdueinnexttwelvemonths	1000000	USD
CY2020Q3	tve	Us Congress Is Required To Take Action If These Layes Are Exhausted USCongressIsRequiredToTakeActionIfTheseLayesAreExhausted	2	Insurance_layers
CY2020Q3	tve	Nuclear Liability Insurance NuclearLiabilityInsurance	450000000	USD
CY2020Q3	tve	Assessment From Licensees For Each Licensed Reactor AssessmentFromLicenseesForEachLicensedReactor	138000000	USD
CY2020Q3	tve	Number Of Licensed Nuclear Units NumberOfLicensedNuclearUnits	7	Units
CY2020Q3	tve	Maximum Assessment Per Nuclear Incident MaximumAssessmentPerNuclearIncident	963000000	USD
CY2020Q3	tve	Nuclear Accident Assessment Limitation Per Year Per Unit NuclearAccidentAssessmentLimitationPerYearPerUnit	20000000	USD
CY2020	tve	Numberoflicensedreactorsin Us NumberoflicensedreactorsinUS	97	reactors
CY2020Q3	tve	Total Amount Of Protection Available TotalAmountOfProtectionAvailable	13800000000	USD
CY2020Q3	tve	Amount Of Insurance Available For Loss At Any One Site AmountOfInsuranceAvailableForLossAtAnyOneSite	2100000000	USD
CY2020Q3	tve	Amount Of Insurance Available For Loss At Any One Site Max AmountOfInsuranceAvailableForLossAtAnyOneSiteMax	2800000000	USD
CY2020Q3	tve	Maximumamountofretrospectivepremiums Maximumamountofretrospectivepremiums	145000000	USD
CY2020Q3	tve	Maximum Idemnity If Covered Accident Tasks Or Keeps Nuclear Unit Offline MaximumIdemnityIfCoveredAccidentTasksOrKeepsNuclearUnitOffline	490000000	USD
CY2020Q3	tve	Retrospective Premiums RetrospectivePremiums	43000000	USD
CY2020Q3	tve	Number Of Procedures For Determining Estimates For Costs Of Nuclear Decommissioning NumberOfProceduresForDeterminingEstimatesForCostsOfNuclearDecommissioning	2	Procedures
CY2020Q3	tve	Amountspenttoreduceemissionssince1970 Amountspenttoreduceemissionssince1970	6800000000	USD
CY2020	tve	Amount Spent To Reduce Emissions AmountSpentToReduceEmissions	19000000	USD
CY2019	tve	Amount Spent To Reduce Emissions AmountSpentToReduceEmissions	17000000	USD
CY2018	tve	Amount Spent To Reduce Emissions AmountSpentToReduceEmissions	62000000	USD
CY2020Q3	tve	Possible Additional Future Costs For Compliance With Clean Air Act Requirements PossibleAdditionalFutureCostsForComplianceWithCleanAirActRequirements	156000000	USD
CY2020Q3	tve	Possibleadditionalfuturecostsforcompliancewith Cc Rrequirements PossibleadditionalfuturecostsforcompliancewithCCRrequirements	949000000	USD
CY2020Q3	tve	Possibleadditionalfuturecostsforcompliancewith Clean Waterrequirements. PossibleadditionalfuturecostsforcompliancewithCleanWaterrequirements.	190000000	USD
CY2020Q3	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	14000000	USD
CY2019Q3	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	15000000	USD
CY2020Q3	tve	Amountspentunderenvironmentalagreements Amountspentunderenvironmentalagreements	280000000	USD
CY2020	tve	Amount Remaining To Be Spent Under Environmental Agreements AmountRemainingToBeSpentUnderEnvironmentalAgreements	11000000	USD
CY2020	us-gaap	Loss Contingency Damages Sought Value LossContingencyDamagesSoughtValue	30000000	USD
CY2020Q3	tve	Remaining Appropriation Investment RemainingAppropriationInvestment	258000000	USD
CY2020Q3	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	150000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	532000000	USD
CY2019Q4	us-gaap	Revenues Revenues	2578000000	USD
CY2020Q1	us-gaap	Revenues Revenues	2521000000	USD
CY2020Q2	us-gaap	Revenues Revenues	2251000000	USD
CY2020Q3	us-gaap	Revenues Revenues	2899000000	USD
CY2020	us-gaap	Revenues Revenues	10249000000	USD
CY2019Q4	us-gaap	Operating Expenses OperatingExpenses	2046000000	USD
CY2020Q1	us-gaap	Operating Expenses OperatingExpenses	1914000000	USD
CY2020Q2	us-gaap	Operating Expenses OperatingExpenses	1716000000	USD
CY2020Q3	us-gaap	Operating Expenses OperatingExpenses	1862000000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	7538000000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	607000000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	535000000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1037000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2711000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	192000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	255000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	205000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	700000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1352000000	USD
CY2018Q4	us-gaap	Revenues Revenues	2725000000	USD
CY2019Q1	us-gaap	Revenues Revenues	2750000000	USD
CY2019Q2	us-gaap	Revenues Revenues	2604000000	USD
CY2019Q3	us-gaap	Revenues Revenues	3239000000	USD
CY2019	us-gaap	Revenues Revenues	11318000000	USD
CY2018Q4	us-gaap	Operating Expenses OperatingExpenses	1960000000	USD
CY2019Q1	us-gaap	Operating Expenses OperatingExpenses	2158000000	USD
CY2019Q2	us-gaap	Operating Expenses OperatingExpenses	2088000000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	2301000000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	8507000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	765000000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	592000000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	516000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	938000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	2811000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	423000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	241000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	165000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	588000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1417000000	USD
CY2020Q3	tve	Total Number Of Lp Cs TotalNumberOfLPCs	153	Units

Files In Submission

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$TVE
Tennessee Valley Authority Stock $tve

2026 Q3 Form 10-K Financial Statement

#000137698620000030 Filed on November 17, 2020

Income Statement

Balance Sheet

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$TVE Tennessee Valley Authority Stock $tve

2026 Q3 Form 10-K Financial Statement

#000137698620000030 Filed on November 17, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TVE
Tennessee Valley Authority Stock $tve