Debt (Percentage Of Outstanding Principal Balance Of Non-Recourse Notes) (Details) - Senior Secured Notes Due 2024 - Subsequent Event	Apr. 27, 2017
Debt Instrument [Line Items]
Redemption price (percent)	101.00%
2020
Debt Instrument [Line Items]
Redemption price (percent)	102.938%
2021
Debt Instrument [Line Items]
Redemption price (percent)	101.469%
2022 and thereafter
Debt Instrument [Line Items]
Redemption price (percent)	100.00%

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration