Share-based Compensation - Stock Options Activity Rollforward (Details) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Number of Shares
Outstanding at beginning of period (shares) | shares	270
Granted (shares) | shares	50
Exercised (shares) | shares	(20)
Forfeited / Cancelled (shares) | shares	(10)
Outstanding at end of period (shares) | shares	290
Vested and expected to vest (shares) | shares	280
Exercisable at end of year (shares) | shares	180
Weighted-average Exercise Price
Outstanding at beginning of period (usd per share) | $ / shares	$ 79.91
Granted (usd per share) | $ / shares	114.93
Exercised (usd per share) | $ / shares	52.02
Forfeited / Cancelled (usd per share) | $ / shares	109.23
Outstanding at end of period (usd per share) | $ / shares	87.09
Vested and expected to vest at end of year (usd per share) | $ / shares	86.29
Exercisable at end of year (usd per share) | $ / shares	$ 70.22
Outstanding at end of year, aggregate intrinsic value | $	$ 14.5
Vested and expected to vest at end of year, aggregate intrinsic value | $	12.1
Exercisable at end of year, aggregate intrinsic value | $	$ 14.4
Outstanding at end of year, weighted average contractual term	6 years
Vested and expected to vest at end of year, weighted average contractual term	5 years 10 months 24 days
Exercisable at end of year, weighted average contractual term	4 years 9 months 18 days