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	$ 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
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
Stockholders' Equity Attributable to Parent	10,816	1	2,600	9,255	849	(1,889)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	10,906
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	466
Other Comprehensive Income (Loss), Net of Tax	903				903
Dividends, Common Stock, Cash	(118)			(118)
Treasury Stock, Value, Acquired, Cost Method	(38)					38
Stock Issued During Period, Value, Treasury Stock Reissued	(24)		(24)	(40)		(40)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(3)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	469
Net Income (Loss) Attributable to Noncontrolling Interest	3
Stockholders' Equity Attributable to Parent	11,402	1	2,608	9,443	1,238	(1,888)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	11,492
Stockholders' Equity Attributable to Noncontrolling Interest	90
Net income	180
Other Comprehensive Income (Loss), Net of Tax	514				514
Dividends, Common Stock, Cash	(59)			(59)
Treasury Stock, Value, Acquired, Cost Method	0					0
Stock Issued During Period, Value, Treasury Stock Reissued	(16)		(16)	(1)		(1)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	181
Net Income (Loss) Attributable to Noncontrolling Interest	1
Stockholders' Equity Attributable to Parent	12,053	$ 1	$ 2,624	$ 9,563	$ 1,752	$ (1,887)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	12,143
Stockholders' Equity Attributable to Noncontrolling Interest	$ 90