Stockholders’ Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income	$ 306.6	$ 240.9
Denominator:
Weighted average outstanding shares - basic (in shares)	47.0	46.3
Effect of dilutive securities:
Stock options, RSUs, and ESPP (in shares)	2.7	3.3
Weighted average shares - diluted (in shares)	49.7	49.6
Net income per common share:
Basic (in dollars per share)	$ 6.52	$ 5.20
Diluted (in dollars per share)	$ 6.17	$ 4.86
Stock options and restricted stock units excluded from calculation (in shares)	0.7	0.1