Shareholders' Equity - Share Repurchase and Dividends (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	May 31, 2023	Aug. 31, 2022	May 31, 2021
Shareholders' Equity
Excise tax on stock repurchases						1.00%
May 2021 Repurchase Program
Shareholders' Equity
Amount approved for repurchase of common stock							$ 500.0
Common stock repurchased during the period (in shares)		1,192,898	315,318	3,779,694
Aggregate cost of common stock repurchased during the period		$ 72.4	$ 22.2	$ 238.3
Remaining authorization amount for repurchase of common stock	$ 94.4		$ 94.4
Stock repurchase program expiration date			May 31, 2023
May 2023 Repurchase Program
Shareholders' Equity
Amount approved for repurchase of common stock					$ 500.0
Common stock repurchased during the period (in shares)	1,243,461
Aggregate cost of common stock repurchased during the period	$ 79.7
Remaining authorization amount for repurchase of common stock	$ 420.3		$ 420.3