Share-Based Compensation - STAP Awards (Details) - STAP awards - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Awards granted
Grant expiration period from the grant date	10 years
Award vesting period	4 years
Aggregate STAP liability	$ 46.3		$ 80.8
Weighted-average assumptions used to measure the fair value of the outstanding STAP awards:
Expected term of awards (in years)	10 months 24 days	1 year 2 months 12 days
Expected volatility	28.60%	34.40%
Risk-free interest rate (as a percent)	4.60%	1.60%
Expected dividend yield	0.00%	0.00%
Closing price of common stock (in dollars per share)	$ 223.96	$ 179.41	$ 278.09
Number of Awards
Outstanding at beginning of period (in shares)	555,600
Granted (in shares)	0
Exercised (in shares)	(29,639)
Forfeited (in shares)	(500)
Outstanding at end of period (in shares)	525,461
Exercisable at end of period (in shares)	525,461
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 140.54
Granted (in dollars per share)	0
Exercised (in dollars per share)	73.80
Forfeited (in dollars per share)	53.83
Outstanding at end of period (in dollars per share)	144.39
Exercisable at end of period (in dollars per share)	$ 144.39
Weighted Average Remaining Contractual Term (in Years)
Outstanding at end of the period	1 year 8 months 12 days
Exercisable at end of period	1 year 8 months 12 days
Aggregate Intrinsic Value (in millions)
Outstanding at end of period	$ 41.8
Exercisable at end of period	$ 41.8