Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Net Period Benefit Costs (Income) for Post-retirement Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 7.0	$ 4.0
Net periodic cost (income)	2.0	(0.6)
Other post-retirement employee benefit plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.4	0.2
Amortization of net prior service credit and net actuarial gain	(0.1)	(0.1)
Net periodic cost (income)	$ 0.3	$ 0.1