Common Stock, Preferred Stock and Equity Plans - Outstanding and Exercisable Options (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Stock Options
Outstanding at beginning of period (in shares)	1,594
Granted (in shares)	7
Exercised (in shares)	(447)
Outstanding at end of period (in shares)	1,154	1,594
Exercisable (in shares)	1,154
Weighted-average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 156.36
Granted (in dollars per share)	502.97
Exercised (in dollars per share)	125.30
Outstanding at end of period (in dollars per share)	170.54	$ 156.36
Exercisable (in dollars per share)	$ 170.54
Weighted-average Remaining Contractual Life
Outstanding (in years)	2 years 7 months 17 days
Exercisable (in years)	2 years 7 months 17 days
Aggregate Intrinsic Value
Outstanding	$ 326.7
Exercisable	$ 326.7
Market share price (in dollars per share)	$ 453.36
Total intrinsic value of stock options exercised	$ 147.8	$ 112.8	$ 128.4
Total cash received from employees as a result of employee stock option exercises	$ 55.6	$ 50.0	$ 80.8
Maximum | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years