Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	AOCI Attributable to Parent [Member]	Retained Earnings	Non-Controlling Interest	Dividend to Parent [Member]	Extraordinary Item [Member] Dividend to Parent [Member]
Income Taxes Paid, Net	$ 187
Beginning balance at Dec. 31, 2013	8,239	$ 6	$ 6,959	$ 574	$ 700	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Return of capital to parent	(271)		(271)			0
Net Income (Loss) Attributable to Parent	676				676
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	677
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	1					1
Net Income (Loss) Attributable to Noncontrolling Interest	1					1
Total other comprehensive income	647			647
Ending balance at Dec. 31, 2014	9,291	6	6,688	1,221	1,376	0
Income Taxes Paid, Net	(80)
Dividends							$ (1,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	500				500
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	500
Net Income (Loss) Attributable to Noncontrolling Interest	0					0
Total other comprehensive income	(628)			(628)
Ending balance at Dec. 31, 2015	8,162	6	5,687	593	1,876	0
Income Taxes Paid, Net	210
Dividends								$ (752)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	282				282
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	282
Net Income (Loss) Attributable to Noncontrolling Interest	0					0
Total other comprehensive income	129
Ending balance at Dec. 31, 2016	$ 7,821	$ 6	$ 4,935	$ 722	$ 2,158	$ 0