XML 43 R47.htm IDEA: XBRL DOCUMENT v2.4.1.9

Other Long-Term Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Other Long-Term Assets
EnergyRight receivables	166us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount	$ 166us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount
Currency swap asset, net	20us-gaap_ForeignCurrencyContractAssetFairValueDisclosure	0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
Total other long-term assets	509us-gaap_OtherAssetsNoncurrent	483us-gaap_OtherAssetsNoncurrent
Energy Right Program
Other Long-Term Assets
Number of days in default	180 days
Other Noncurrent Assets [Member]
Other Long-Term Assets
EnergyRight receivables	125us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	123us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Unamortized debt issue cost of power bonds	66us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	68us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Loans and other long-term receivables, net	102us-gaap_NotesAndLoansReceivableNetNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	87us-gaap_NotesAndLoansReceivableNetNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Prepaid capacity payments	56us-gaap_PrepaidExpenseOtherNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	58us-gaap_PrepaidExpenseOtherNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Restricted cash	38us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	64us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Currency swap asset, net	20us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Other	102us-gaap_OtherAssetsMiscellaneousNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	83us-gaap_OtherAssetsMiscellaneousNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember
Accounts Receivable [Member]
Other Long-Term Assets
EnergyRight receivables	33us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_AccountsReceivableMember	$ 33us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_BalanceSheetLocationAxis = us-gaap_AccountsReceivableMember

X

- Definition

The number of days in default that are determined to be uncollectible.

+ References

No definition available.

+ Details

Name:	tve_Numberofdaysindefault
Namespace Prefix:	tve_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	tve_OtherLongTermAssetsLineItems
Namespace Prefix:	tve_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

+ Details

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

X

- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date more than one year from the balance sheet date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

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

X

- Definition

Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

+ References

No definition available.

+ Details

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

X

- Definition

Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

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

X

- Definition

Carrying amount as of the balance sheet date of amounts paid in advance which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 4

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765

+ Details

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

X

- Definition

Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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

+ Details

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

X

- Definition

Carrying amount of financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=34720971&loc=SL6224234-111729

+ Details

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

X

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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

+ Details

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

X

- Details

Name:	tve_OtherLongTermLiabilitiesAxis=tve_EnergyRightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: