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Consolidated Statements Of Shareholders' Equity
$ in Millions
USD ($)
Beginning Balance at Dec. 31, 2012 $ 2,511
Statement of Stockholders' Equity [Abstract]  
Acquisition of noncontrolling interest 0
Share-based compensation 16
Common stock issued upon exercise of stock options 6
Dividends declared to shareholders (36)
Adjustment pursuant to tax sharing agreement (7)
Treasury Stock, Value, Acquired, Cost Method 7
Repurchases of common stock (7)
Issuance of ESPP shares 4
Investments by noncontrolling interests 9
Distributions to noncontrolling interests (109)
Other noncontrolling interest activity 2
Comprehensive income (loss) 50
Ending Balance at Dec. 31, 2013 2,439
Statement of Stockholders' Equity [Abstract]  
Acquisition of noncontrolling interest 0
Share-based compensation 22
Common stock issued upon exercise of stock options 4
Dividends declared to shareholders (47)
Adjustment pursuant to tax sharing agreement 0
Treasury Stock, Value, Acquired, Cost Method 106
Repurchases of common stock (106)
Issuance of ESPP shares 4
Investments by noncontrolling interests 10
Distributions to noncontrolling interests (61)
Other noncontrolling interest activity 2
Comprehensive income (loss) (1,332)
Ending Balance at Dec. 31, 2014 935
Statement of Stockholders' Equity [Abstract]  
Acquisition of noncontrolling interest (40)
Share-based compensation 18
Common stock issued upon exercise of stock options 1
Dividends declared to shareholders (47)
Adjustment pursuant to tax sharing agreement 0
Treasury Stock, Value, Acquired, Cost Method 62
Repurchases of common stock (62)
Issuance of ESPP shares 5
Investments by noncontrolling interests 0
Distributions to noncontrolling interests (28)
Other noncontrolling interest activity (3)
Comprehensive income (loss) 273
Ending Balance at Dec. 31, 2015 $ 1,052