Shareholders' Equity (Details 1) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, Beginning balance	6,383,799
Granted	716,818
Exercised	(1,475,202)
Forfeited/Cancelled	(109,325)
Options outstanding, Ending balance	5,516,090	6,383,799
Options exercisable	2,988,920
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Average exercise price, Beginning balance	$ 36.92
Average exercise price, Granted	63.15	$ 56.47	$ 44.01
Average exercise price, Exercised	31.77
Average exercise price, Forfeited/Cancelled	49.34
Average exercise price, Ending balance	41.46	$ 36.92
Average exercise price, Options exercisable	$ 32.85
Average remaining contractual term, Options outstanding	5 years 10 months 24 days
Average remaining contractual term, Options exercisable	4 years 4 months 24 days
Aggregate intrinsic value, Options outstanding	$ 169
Aggregate intrinsic value, Options exercisable	$ 117