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Pension and Postretirement Benefits - Components of Net Periodic Benefit (Income) Expense (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2023
USD ($)
retiree
Mar. 31, 2022
USD ($)
Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0.3 $ 0.5
Interest cost 58.5 38.9
Expected return on plan assets (69.4) (68.4)
Amortization of prior service benefit (1.2) (1.3)
Recognized net actuarial (loss) gain 22.1 40.9
Settlement losses 183.2 0.0
Net periodic pension expense (income) 193.5 10.6
Pension Plans | U.S. Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0.0 0.0
Interest cost 40.8 28.3
Expected return on plan assets (48.6) (47.5)
Amortization of prior service benefit (0.6) (0.6)
Recognized net actuarial (loss) gain 19.9 30.7
Settlement losses 183.2 0.0
Net periodic pension expense (income) 194.7 10.9
Group annuity contract to transfer projected benefit obligations, purchase amount $ 265.0  
Group annuity contract to transfer projected benefit obligations, number of retirees | retiree 8,650  
Pension Plans | International Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0.3 0.5
Interest cost 17.7 10.6
Expected return on plan assets (20.8) (20.9)
Amortization of prior service benefit (0.6) (0.7)
Recognized net actuarial (loss) gain 2.2 10.2
Settlement losses 0.0 0.0
Net periodic pension expense (income) (1.2) (0.3)
Postretirement Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0.0 0.0
Interest cost 0.8 0.5
Expected return on plan assets (0.1) (0.1)
Amortization of prior service benefit (0.3) (0.3)
Recognized net actuarial (loss) gain (0.7) (0.5)
Net periodic pension expense (income) $ (0.3) $ (0.4)