Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent									35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed Tax (Expense) Benefit at Statutory Rate									$ 99	$ 83	$ (25)
Effect of Earnings in Jurisdictions outside of the United States									(30)	(13)	(12)
Change in Valuation Allowance									(3,386)	(197)	27
Disallowed Interest									(62)	(25)	(33)
Non-Deductible Deconsolidation Loss									(57)	0	0
Other Permanent Items									(25)	(19)	(11)
Indefinite-lived assets									0	(2)	3
Uncertain Tax Positions									(5)	3	9
Change in Tax Rate									(20)	(7)	(7)
Other, net									(2)	5	3
Income Tax Benefit (Expense)	$ 3,189	$ (16)	$ (18)	$ (5)	$ 103	$ (8)	$ (12)	$ (7)	$ 3,150	$ 76	$ (38)