Share-Based Compensation - Stock Options Exercise Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Summary of stock option exercise data
Cash received			$ 126.8	$ 90.7
Stock options
Summary of stock option exercise data
Number of options exercised (in shares)	255,583	38,433	980,999	791,777
Cash received	$ 32.5	$ 4.6	$ 126.8	$ 90.7
Total intrinsic value of options exercised	$ 52.9	$ 4.1	$ 140.9	$ 99.5