Stock Plans (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Summary of Stock Option Activity [Roll Forward]
Stock Options, Beginning Balance, Shares | shares	4,172
Stock Options Granted, shares | shares	422
Stock Options Exercised, shares | shares	(822)
Stock Options Forfeited, shares | shares	(21)
Stock Options Expired, shares | shares	0
Stock Options, Ending Balance, Shares | shares	3,751
Summary of Stock Option Activity, Weighted Average Exercise Price [Roll Forward]
Stock Options, Beginning balance, weighted average exercise price (in dollars per share) | $ / shares	$ 72.70
Stock Options Granted, weighted average exercise price (in dollars per share) | $ / shares	131.68
Stock Options Exercised, weighted average exercise price (in dollars per share) | $ / shares	53.50
Stock Options Forfeitures, weighted average exercise price (in dollars per share) | $ / shares	65.43
Stock Options Expired, weighted average exercise price (in dollars per share) | $ / shares	0
Stock Options, Ending balance, weighted average exercise price (in dollars per share) | $ / shares	$ 83.59
Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Awards Activity, Weighted Average Grant Price [Roll Forward]
Options vested and expected to vest, shares | shares	3,751
Options exercisable, shares | shares	2,706
Options vested and expected to vest, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 83.59
Options exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 72.26
Service-Based RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Awards Activity [Roll Forward]
RSAs/RSUs Beginning balance, shares | shares	2,412
RSAs/RSUs Granted, shares | shares	816
RSAs/RSUs Vested, shares | shares	(1,042)
RSAs/RSUs Forfeited, shares | shares	(108)
RSAs/RSUs Ending balance, shares | shares	2,078
Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Awards Activity, Weighted Average Grant Price [Roll Forward]
RSAs/RSUs Beginning Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 91.42
RSAs/RSUs Granted, Weighted Average Grant Price (in dollars per share) | $ / shares	127.56
RSAs/RSUs Vested, Weighted Average Grant Price (in dollars per share) | $ / shares	82.77
RSAs/RSUs Forfeited, Weighted Average Grant Price (in dollars per share) | $ / shares	105.32
RSAs/RSUs Ending Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 109.23
Service and Performance-Based RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Awards Activity [Roll Forward]
RSAs/RSUs Beginning balance, shares | shares	3,392
RSAs/RSUs Granted, shares | shares	1,089
RSAs/RSUs Vested, shares | shares	(1,193)
RSAs/RSUs Forfeited, shares | shares	(142)
RSAs/RSUs Ending balance, shares | shares	3,146
Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Awards Activity, Weighted Average Grant Price [Roll Forward]
RSAs/RSUs Beginning Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 88.25
RSAs/RSUs Granted, Weighted Average Grant Price (in dollars per share) | $ / shares	122.15
RSAs/RSUs Vested, Weighted Average Grant Price (in dollars per share) | $ / shares	78.52
RSAs/RSUs Forfeited, Weighted Average Grant Price (in dollars per share) | $ / shares	101.38
RSAs/RSUs Ending Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 103.08