XML 131 R77.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Debt and Other Obligations Debt and Other Obligations - Lease/Leasebacks (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) Companies | Sep. 30, 2003 USD ($) Agreements | Jul. 20, 2016 USD ($) | Sep. 30, 2015 USD ($)
Lease/Leasebacks [Abstract] |  |  |  |
Proceeds prior to 2004 for CTs |  | $ 945 |  |
Leaseback transaction, number of units | Agreements |  | 24 |  |
Proceeds in 2003 for QTEs |  | $ 389 |  |
Percentage equity interests acquired |  |  | 100.00% |
Number of SPE's acquired | Companies | 2 |  |  |
Leaseback obligation settled as a result of acquisition |  |  | $ 70 |
Number of combustion units - Lease/leaseback |  |  | 8 |
CT and QTE outstanding leaseback obligation | $ 467 |  |  | $ 616

X
- Definition The outstanding leaseback obligations related to combustion turbine units and qualified technological equipment and software. + References No definition available. + Details
Name: | tve_CtAndQteOutstandingLeasebackObligation
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lease/Leasebacks [Abstract] + References No definition available. + Details
Name: | tve_LeaseLeasebacksAbstract
Namespace Prefix: | tve_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units involved in leaseback transactions. + References No definition available. + Details
Name: | tve_LeasebackTransactionNumberOfUnits
Namespace Prefix: | tve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Leaseback obligation settled as a result of acquisition + References No definition available. + Details
Name: | tve_Leasebackobligationsettledasaresultofacquisition
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of combustion units - Lease/leaseback + References No definition available. + Details
Name: | tve_NumberofcombustionunitsLeaseleaseback
Namespace Prefix: | tve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds received from entering into a leaseback transaction for qualified technological equipment and software in 2003. + References No definition available. + Details
Name: | tve_ProceedsIn2003
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds received prior to 2004 by entering into leaseback transactions for 24 new peaking combustion turbine units. + References No definition available. + Details
Name: | tve_ProceedsPriorTo2004
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
Name: | us-gaap_NumberOfBusinessesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration