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Debt and Other Obligations Power Bonds (Details) (USD $)	Jul. 15, 2012	Jun. 30, 2012 Debt Ceiling	Apr. 15, 2012 1992 Series D
Debt Instrument
Debt ceiling		$ 30,000,000,000
Repurchased face amount			1,000,000,000
Interest rate			8.25%
Percent of par value	100.00%		106.00%
Premium paid to redeem debt			$ 60,000,000

X

- Definition

The TVA Act provides that TVA can issue Bonds in an amount not to exceed $30.0 billion outstanding at any time.

+ References

No definition available.

+ Details

Name:	tve_DebtCeiling
Namespace Prefix:	tve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The percent of par value that debt was redeemed for.

+ References

No definition available.

+ Details

Name:	tve_PercentOfParValue
Namespace Prefix:	tve_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of premium paid to redeem debt.

+ References

No definition available.

+ Details

Name:	tve_PremiumPaidToRedeemDebt
Namespace Prefix:	tve_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant