Share-Based Compensation (Changes in Options Outstanding Under the Plans) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Ten point seventy four dollars to sixty eight point seventy dollars [Member]
Weighted average remaining life, Outstanding, in years	6 years 9 months 18 days
Stock Options [Member]
Shares subject to options, Beginning balance	6,285,351	6,354,882	6,846,895
Shares subject to options, Granted	1,286,857	1,541,025	1,518,335
Shares subject to options, Exercised	(2,076,338)	(1,515,955)	(1,789,615)
Shares subject to options, Cancelled	(76,624)	(94,601)	(220,733)
Shares subject to options, Ending balance	5,419,246	6,285,351	6,354,882
Shares subject to options, Exercisable	2,689,923
Weighted average exercise price, Beginning balance, in dollars per share	$ 66.95	$ 56.49	$ 47.81
Weighted average exercise price, Granted, in dollars per share	101.42	89.71	80.27
Weighted average exercise price, Exercised, in dollars per share	56.17	45.44	42.79
Weighted average exercise price, Cancelled, in dollars per share	92.38	79.53	61.91
Weighted average exercise price, Ending Balance, in dollars per share	78.91	$ 66.95	$ 56.49
Weighted average exercise price, Exercisable, in dollars per share	$ 64.22
Aggregate intrinsic value, Outstanding, in USD	$ 292.7
Aggregate intrinsic value, Exercisable, in USD	$ 184.8
Weighted average remaining life, Exercisable, in years	5 years 4 months 24 days