Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options granted during the period (in shares)	242	244
Fair value per share (in dollars per share)	$ 182.89	$ 173.78
Cash received from exercise of options	$ 61.1	$ 39.3
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted (in shares)	342	337
Weighted-average grant date fair value (in dollars per share)	$ 608.04	$ 557.15
Restricted stock awards vested during period (in shares)	93	100
Weighted average grant date fair value per share (in dollars per share)	$ 479.18	$ 437.34
Weighted average vest date fair value per share (in dollars per share)	$ 582.56	$ 556.38
Performance/market-based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted (in shares)	74	72
Weighted-average grant date fair value (in dollars per share)	$ 663.42	$ 563.04
Vesting period	3 years
Performance/market-based | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage	200.00%
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of eligible earnings to purchase common stock through the employee stock purchase plan	10.00%
Discount on the average closing price for the employee stock purchase plan	10.00%
Shares of stock purchased during the period by participants in the employee stock purchase plan (in shares)	16	12
Proceeds from issuance of shares under employee stock purchase plan	$ 7.2	$ 5.8