Consolidated Statements of Changes in Stockholder's Equity - USD ($) $ in Millions	Total		Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance, beginning at Dec. 31, 2015	$ 16,593		$ 144	$ 7,868	$ 9,116	$ (750)	$ 215
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	50	[1]			62		(12)
Other comprehensive income (loss), net of tax	234					234
Compensation—restricted stock units	10			10	0
Other	7			0	0		7
Net change	301			10	62	234	(5)
Balance, ending at Mar. 31, 2016	16,894		144	7,878	9,178	(516)	210
Balance, beginning at Dec. 31, 2016	17,386		144	7,884	10,101	(896)	153
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	224	[1]			229		(5)
Other comprehensive income (loss), net of tax	13					13
Compensation—restricted stock units	9			8	1
Other	(2)			0	0		(2)
Net change	244			8	230	13	(7)
Balance, ending at Mar. 31, 2017	$ 17,630		$ 144	$ 7,892	$ 10,331	$ (883)	$ 146

[1] The transferred IHC entities are not measured using a "market view" perspective.