Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options granted during the period (in shares)	285	283
Fair value per share (in dollars per share)	$ 180.74	$ 173.30
Cash received from exercise of options	$ 97.5	$ 104.0
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted (in shares)	436	396
Weighted-average grant date fair value (in dollars per share)	$ 594.78	$ 554.52
Restricted stock awards vested during period (in shares)	106	122
Weighted average grant date fair value per share (in dollars per share)	$ 479.96	$ 433.13
Weighted average vest date fair value per share (in dollars per share)	$ 576.58	$ 555.61
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	$ 563.03
Vesting period (in years)	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)	37	29
Proceeds from issuance of shares under employee stock purchase plan	$ 17.4	$ 14.5