Condensed Consolidated Statements of Stockholders Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common
Stockholders' Equity Attributable to Parent	$ 7,081	$ 1	$ 2,502	$ 8,169	$ (1,871)	$ (1,720)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7,171
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	457
Other Comprehensive Income (Loss), Net of Tax	473
Dividends, Common Stock, Cash	(107)			(107)
Treasury Stock, Value, Acquired, Cost Method	(119)					119
Stock Issued During Period, Value, Treasury Stock Reissued	(20)		(20)	(36)		(36)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(3)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	460
Net Income (Loss) Attributable to Noncontrolling Interest	3
Stockholders' Equity Attributable to Parent	7,626	1	2,506	8,336	(1,461)	(1,756)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7,716
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	205
Other Comprehensive Income (Loss), Net of Tax	63				63
Dividends, Common Stock, Cash	(54)			(54)
Treasury Stock, Value, Acquired, Cost Method	(52)					52
Stock Issued During Period, Value, Treasury Stock Reissued	(17)		(16)	(4)		(5)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(2)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	207
Net Income (Loss) Attributable to Noncontrolling Interest	2
Stockholders' Equity Attributable to Parent	7,805	1	2,522	8,483	(1,398)	(1,803)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7,895
Stockholders' Equity Attributable to Noncontrolling Interest	90
Stockholders' Equity Attributable to Parent	9,081	1	2,544	8,805	(369)	(1,900)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	9,171
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	413
Other Comprehensive Income (Loss), Net of Tax	349				349
Dividends, Common Stock, Cash	(112)			(112)
Treasury Stock, Value, Acquired, Cost Method	(19)					19
Stock Issued During Period, Value, Treasury Stock Reissued	(23)		(23)	(30)		(30)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(3)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	416
Net Income (Loss) Attributable to Noncontrolling Interest	3
Stockholders' Equity Attributable to Parent	9,468	1	2,549	8,934	(125)	(1,891)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	9,558
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	203
Other Comprehensive Income (Loss), Net of Tax	105				105
Dividends, Common Stock, Cash	(56)			(56)
Treasury Stock, Value, Acquired, Cost Method	(3)					3
Stock Issued During Period, Value, Treasury Stock Reissued	(18)		(18)	(5)		(5)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	204
Net Income (Loss) Attributable to Noncontrolling Interest	1
Stockholders' Equity Attributable to Parent	9,735	$ 1	$ 2,567	$ 9,076	$ (20)	$ (1,889)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	9,825
Stockholders' Equity Attributable to Noncontrolling Interest	$ 90