Earnings per Share - Summary of Net Income (Loss) Attributable to Shareholders and Reconciliation of Basic and Diluted Shares (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income attributable to shareholders	$ 95.3	$ 34.1	$ 163.3	$ 156.9
Net income attributable to shareholders	$ 95.3	$ 34.1		$ 156.9
Weighted average common shares outstanding – Basic (in shares)	42.9	44.8	43.0	44.9
Dilutive impact of share-based compensation awards (in shares)	0.5	0.3	0.5	0.4
Weighted average common shares outstanding – Diluted (in shares)	43.4	45.1	43.5	45.2
Share-Based Payment Arrangement
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings (in shares)	0.5	0.7	0.5	0.6
Convertible Debt Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings (in shares)	1.6	1.6	1.6	1.6