Earnings Per Share - Summary of Basic and Diluted Earnings Per Share and Antidilutive Securities Excluded From Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Income from continuing operations	$ 213.5	$ 246.6	$ 609.1	$ 702.7
Less: Income allocated to participating securities	0.4	0.5	1.1	1.4
Income available to common stockholders	$ 213.1	$ 246.1	$ 608.0	$ 701.3
Shares:
Basic weighted-average shares outstanding (in shares)	42,500,000	45,900,000	43,200,000	47,000,000.0
Effect of dilutive securities (in shares)	400,000	600,000	400,000	600,000
Diluted weighted-average shares outstanding (in shares)	42,900,000	46,500,000	43,600,000	47,600,000
Earnings per share from continuing operations attributable to common shares:
Basic (in dollars per share)	$ 5.01	$ 5.36	$ 14.07	$ 14.93
Diluted (in dollars per share)	$ 4.97	$ 5.30	$ 13.94	$ 14.74
Anti-dilutive stock options excluded from earnings per share calculation (in shares)	100,000	0	100,000	100,000