XML 22 R79.htm IDEA: XBRL DOCUMENT v2.4.1.9

Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 14, 2015	Mar. 31, 2015 Megawatts	Jun. 01, 2015
Subsequent Events [Line Items]
Megawatts		700tve_Megawatts
Debt Instrument, Interest Rate, Stated Percentage		3.83%us-gaap_DebtInstrumentInterestRateStatedPercentage
Subsequent Events
Subsequent Events [Line Items]
Plant Acquisition Amount	$ 342us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Debt Instrument, Interest Rate, Stated Percentage			3.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Debt Instrument, Repurchased Face Amount			$ 324us-gaap_DebtInstrumentRepurchasedFaceAmount / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X

- Definition

Megawatts of summer net capability

+ References

No definition available.

+ Details

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Namespace Prefix:	tve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-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 210.5-02.22(a)(1))

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

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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