v3.26.1
Pension and Other Retiree Benefits - Net Periodic Benefit Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension | U.S.        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0.0 $ 0.0 $ 0.0 $ 0.0
Interest cost 1.8 1.9 3.6 3.8
Expected return on plan assets (3.2) (3.2) (6.4) (6.4)
Amortization of net loss (gain) 0.8 0.6 1.6 1.2
Amortization of prior service cost 0.0 0.0 0.0 0.0
Net periodic benefit (income) cost [1] (0.6) (0.7) (1.2) (1.4)
Pension | International        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.2 0.2 0.3 0.4
Interest cost 4.7 4.8 9.3 9.3
Expected return on plan assets (5.1) (4.6) (10.3) (9.0)
Amortization of net loss (gain) 1.0 1.1 2.1 2.2
Amortization of prior service cost 0.0 0.0 0.1 0.0
Net periodic benefit (income) cost [1] 0.8 1.5 1.5 2.9
Post-retirement        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.0 0.0 0.0 0.0
Interest cost 0.1 0.0 0.1 0.0
Expected return on plan assets 0.0 0.0 0.0 0.0
Amortization of net loss (gain) (0.1) (0.1) (0.2) (0.2)
Amortization of prior service cost 0.0 0.0 0.0 0.0
Net periodic benefit (income) cost [1] $ (0.0) $ (0.1) $ (0.1) $ (0.2)
[1] The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension (income) expense" in the Consolidated Statements of Income.