Share-Based Compensation - Stock Options Activity (Details) - Stock Option - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Shares
Beginning balance (in shares)			1,015,572
Granted (in shares)			225,115
Exercised (in shares)			(87,217)
Forfeited (in shares)			(71,833)
Ending balance (in shares)	1,081,637		1,081,637		1,015,572
Vested and expected to vest (in shares)	1,048,823		1,048,823
Exercisable (in shares)	595,028		595,028
Weighted Average Price
Beginning balance (in dollars per share)			$ 161.45
Granted (in dollars per share)			224.90
Exercised (in dollars per share)			143.37
Forfeited (in dollars per share)			200.60
Ending balance (in dollars per share)	$ 173.52		173.52		$ 161.45
Vested and expected to vest (in dollars per share)	172.37		172.37
Exercisable (in dollars per share)	$ 148.02		$ 148.02
Weighted-Average Remaining Contractual Term
Stock options outstanding, weighted-average remaining contractual term			6 years 9 months 25 days		6 years 11 months 8 days
Weighted-average remaining contractual term, vested and expected to vest			6 years 9 months 3 days
Weighted-average remaining contractual term, exercisable			5 years 5 months 8 days
Aggregate Intrinsic Value
Stock options outstanding, aggregate intrinsic value	$ 40.9		$ 40.9		$ 67.9
Aggregate intrinsic value, vested and expected to vest	40.7		40.7
Aggregate intrinsic value, exercisable	$ 35.8		$ 35.8
Risk-free interest rate	4.26%	3.35%	4.12%	1.87%