Share-Based Compensation - Additional RSUs and Performance Shares Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value, units granted (in dollars per share)	$ 43.50	$ 47.11	$ 77.38
Fair value of awards vested and issued	$ 4.8	$ 4.7	$ 9.3
Tax (expense) benefit for restricted stock compensation expense	$ (0.4)	$ (0.1)	$ 3.8
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value, units granted (in dollars per share)	$ 43.19	$ 51.56	$ 92.98
Fair value of awards vested and issued	$ 1.6	$ 1.7	$ 4.5
Tax (expense) benefit for restricted stock compensation expense	$ (1.0)	$ 0.2	$ 2.3