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Pension Plans and Other Benefits - Changes in Net Periodic Pension Cost - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net Periodic Benefit Cost Before Settlements:      
Curtailment/settlement expense $ (38.9) $ 0.0  
Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income      
The estimated net actuarial (gain) loss and prior service cost (credit) for the pension plans that will be amortized from accumulated other comprehensive income into net periodic benefit cost in the next fiscal year 4.2    
North American Pension Plan      
Net Periodic Benefit Cost Before Settlements:      
Service cost 4.2 4.4 $ 4.2
Interest cost 16.8 14.6 20.9
Expected return on plan assets (26.1) (30.4) (34.2)
Prior service cost 2.1 2.1 2.3
Actuarial loss 1.9 3.8 9.2
Preliminary net periodic benefit cost (1.1) (5.5) 2.4
Curtailment/settlement expense 40.8 0.0 1.0
Total net periodic benefit cost 39.7 (5.5) 3.4
Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income      
Prior service credit (2.1) (2.1) (2.3)
Net actuarial gain (11.6) (5.6) (8.6)
Total recognized in other comprehensive income (loss) (13.7) (7.7) (10.9)
Total recognized in net periodic benefit income and other comprehensive income $ 26.0 $ (13.2) $ (7.5)