Stock Plans (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Summary of Stock Option Activity [Roll Forward]
Stock Options, Beginning Balance, Shares | shares	5,484
Stock Options Granted, shares | shares	408
Stock Options Exercised, shares | shares	(1,626)
Stock Options Forfeited, shares | shares	(94)
Stock Options Expired, shares | shares	0
Stock Options, Ending Balance, Shares | shares	4,172
Summary of Stock Option Activity, Weighted Average Exercise Price [Roll Forward]
Stock Options, Beginning balance, weighted average exercise price (in dollars per share) | $ / shares	$ 64.73
Stock Options Granted, weighted average exercise price (in dollars per share) | $ / shares	101.43
Stock Options Exercised, weighted average exercise price (in dollars per share) | $ / shares	51.92
Stock Options Forfeitures, weighted average exercise price (in dollars per share) | $ / shares	92.19
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	$ 72.70
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	4,171
Options exercisable, shares | shares	2,357
Options vested and expected to vest, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 72.70
Options exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 61.15
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	2,544
RSAs/RSUs Granted, shares | shares	1,041
RSAs/RSUs Vested, shares | shares	(1,001)
RSAs/RSUs Forfeited, shares | shares	(172)
RSAs/RSUs Ending balance, shares | shares	2,412
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	$ 80.15
RSAs/RSUs Granted, Weighted Average Grant Price (in dollars per share) | $ / shares	103.93
RSAs/RSUs Vested, Weighted Average Grant Price (in dollars per share) | $ / shares	76.07
RSAs/RSUs Forfeited, Weighted Average Grant Price (in dollars per share) | $ / shares	89.79
RSAs/RSUs Ending Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 91.42
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	4,022
RSAs/RSUs Granted, shares | shares	1,358
RSAs/RSUs Vested, shares | shares	(1,819)
RSAs/RSUs Forfeited, shares | shares	(169)
RSAs/RSUs Ending balance, shares | shares	3,392
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	$ 74.22
RSAs/RSUs Granted, Weighted Average Grant Price (in dollars per share) | $ / shares	90.34
RSAs/RSUs Vested, Weighted Average Grant Price (in dollars per share) | $ / shares	58.28
RSAs/RSUs Forfeited, Weighted Average Grant Price (in dollars per share) | $ / shares	93.74
RSAs/RSUs Ending Balance, Weighted Average Grant Price (in dollars per share) | $ / shares	$ 88.25