XML 104 R75.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Subsequent Events (Details) - USD ($) $ in Millions | Jul. 20, 2016 | Jul. 08, 2016 | May 26, 2016
--- | --- | --- | ---
Subsequent Event |  |  |
Acquisition cost of special purpose entity |  |  | $ 56
Subsequent Event |  |  |
Subsequent Event |  |  |
Acquisition cost of special purpose entity |  | $ 55 |
Percent equity interest acquired in SPE's | 100.00% |  |

X
- Definition Percent equity interest acquired in SPE's + References No definition available. + Details
Name: | tve_PercentequityinterestacquiredinSPEs
Namespace Prefix: | tve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |