Net Income Per Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Feb. 28, 2023	Dec. 31, 2021
Earnings Per Share [Abstract]
Antidilutive options excluded from computation of diluted net income per share (in shares)	0			200,000			100,000	100,000
Stock repurchase program, shares authorized (in shares)									1,000,000,000	650,000
Share purchased under share repurchase program (in shares)	77,329			86,667			753,399	563,334
Stock purchase program, cost of shares purchased	$ 27.8	$ 173.4	$ 60.1	$ 27.2	$ 28.6	$ 147.1	$ 261.3	$ 202.9
Stock repurchase program, average price per share (in dollars per share)	$ 360.25			$ 313.22			$ 346.86	$ 360.03