Related Party Transactions (Details 2) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Derivative notional amount	$ 155,869	$ 177,428
Transferred Entities
Related Party Transaction [Line Items]
Derivative notional amount	2,500	1,600
Accumulated unrealized gain on derivatives	28	$ 72
Transferred Entities \| Unsecured Debt
Related Party Transaction [Line Items]
Maximum borrowing capacity	1,900
Transferred Entities \| Secured Debt \| Affiliated Entity
Related Party Transaction [Line Items]
Maximum borrowing capacity	$ 475

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Accumulated Unrealized Gain (Loss) on Derivatives

+ References

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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