Share-Based Compensation (Changes in Options Outstanding Under the Plans) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Ten point seventy four dollars to sixty eight point seventy dollars [Member]
Weighted average remaining life, Outstanding, in years	5 years 10 months 30 days
Weighted average remaining life, Exercisable, in years	4 years 5 months 30 days
Stock Options [Member]
Shares subject to options, Beginning balance	7,502,613	8,700,028	14,090,962
Shares subject to options, Granted	1,457,523	1,160,057	1,341,602
Shares subject to options, Exercised	(1,968,725)	(2,253,094)	(6,994,024)
Shares subject to options, Cancelled	(155,382)	(104,378)	(110,496)
Shares subject to options, Ending balance	6,836,029	7,502,613	8,700,028
Shares subject to options, Exercisable	4,361,652
Weighted average exercise price, Beginning balance, in dollars per share	$ 36.21	$ 31.87	$ 36.47
Weighted average exercise price, Granted, in dollars per share	66.25	59.82	52.71
Weighted average exercise price, Exercised, in dollars per share	31.33	31.04	35.33
Weighted average exercise price, Cancelled, in dollars per share	61.03	47.85	44.57
Weighted average exercise price, Ending Balance, in dollars per share	43.46	$ 36.21	$ 31.87
Weighted average exercise price, Exercisable, in dollars per share	$ 33.85
Aggregate intrinsic value, Outstanding, in USD	$ 100.4
Aggregate intrinsic value, Exercisable, in USD	$ 95.0
Weighted average remaining life, Exercisable, in years	4 years 5 months 30 days
Share-based Compensation Arrangement by Shared-based Payment Award, Options, Impact of Spin-off			371,984