Share-Based Compensation (Changes in Options Outstanding Under the Plans) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Weighted average remaining life, Outstanding, in years	5 years 4 months 24 days
Stock Options [Member]
Shares subject to options, Beginning balance	4,150,484	4,411,000	5,719,358
Shares subject to options, Granted	425,444	430,496	589,417
Shares subject to options, Exercised	(1,382,846)	(633,962)	(1,872,069)
Shares subject to options, Cancelled	(21,365)	(57,050)	(25,706)
Shares subject to options, Ending balance	3,171,717	4,150,484	4,411,000
Shares subject to options, Exercisable	2,284,656
Weighted average exercise price, Beginning balance, in dollars per share	$ 94.06	$ 83.39	$ 70.53
Weighted average exercise price, Granted, in dollars per share	182.27	167.93	150.34
Weighted average exercise price, Exercised, in dollars per share	80.67	66.06	64.74
Weighted average exercise price, Cancelled, in dollars per share	168.18	137.38	115.33
Weighted average exercise price, Ending Balance, in dollars per share	111.23	$ 94.06	$ 83.39
Weighted average exercise price, Exercisable, in dollars per share	$ 88.17
Aggregate intrinsic value, Outstanding, in USD	$ 420.8
Aggregate intrinsic value, Exercisable, in USD	$ 355.8
Weighted average remaining life, Exercisable, in years	4 years 3 months 18 days