XML 38 R43.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Significant Accounting Policies Reclassificatons (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Jun. 30, 2013
Accounting Policies [Abstract] |
Reclassification from Other, net to Regulatory assets costs and Pension contributions | $ (14)
Reclassification to Regulatory Assets from Other, net | (8)
Reclassification to Pension contributions from Other, net | (6)
Reclassification from Environmental cleanup costs-Kingston ash spill to Insurance recoveries | 5
Reclassification to Insurance recoveries from Environmental cleanup costs-Kingston ash spill | $ 5

X
- Definition Reclassification from Environmental cleanup costs-Kingston ash spill to Insurance recoveries in the Cash flows from operating activities of the Consolidated Statements of Cash Flows + References No definition available. + Details
Name: | tve_ReclassificationfromEnvironmentalcleanupcostsKingstonashspilltoInsurancerecoveries
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reclassification from Other, net to Regulatory assets and Pension contributions costs in the Cash flows from operating activities section of the Consolidated Statements of Cash Flows + References No definition available. + Details
Name: | tve_ReclassificationfromOthernettoRegulatoryassetsandPensioncontributionscosts
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reclassification to Insurance recoveries from Environmental cleanup costs-Kingston ash spill + References No definition available. + Details
Name: | tve_ReclassificationtoInsurancerecoveriesfromEnvironmentalcleanupcostsKingstonashspill
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reclassification to Pension contributions from Other, net costs in the Cash flows from operating activities section of the Consolidated Statements of Cash Flows + References No definition available. + Details
Name: | tve_ReclassificationtoPensioncontributionsfromOthernet
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reclassification to Regulatory assets from Other, net costs in the Cash flows from operating activities section of the Consolidated Statements of Cash Flows + References No definition available. + Details
Name: | tve_ReclassificationtoRegulatoryAssetsfromOthernet
Namespace Prefix: | tve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration