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Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance $ 2,702.4 $ 2,352.9
Ownership changes 5.6 6.6
Other comprehensive income (loss) before reclassifications and income taxes (148.1) 31.3
Amounts reclassified from accumulated other comprehensive (loss) income, before income tax (10.4) (7.0)
Income tax (expense) benefit (6.7) 2.3
Net current period other comprehensive income (loss), net of income taxes and ownership changes (159.6) 33.2
Noncontrolling interest 4.8 1.8
Net current period comprehensive income (loss), net of income taxes, noncontrolling interest and ownership changes (154.8) 35.0
Ending balance 2,984.1 2,702.4
Foreign currency translation adjustment gains 27.1 3.3
Total    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (146.9) (181.9)
Ending balance (301.7) (146.9)
Foreign currency translation adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (193.8) (235.7)
Ownership changes 5.6 6.6
Other comprehensive income (loss) before reclassifications and income taxes (153.5) 33.5
Amounts reclassified from accumulated other comprehensive (loss) income, before income tax 0.0 0.0
Income tax (expense) benefit (7.7) 0.0
Net current period other comprehensive income (loss), net of income taxes and ownership changes (155.6) 40.1
Noncontrolling interest 4.8 1.8
Net current period comprehensive income (loss), net of income taxes, noncontrolling interest and ownership changes (150.8) 41.9
Ending balance (344.6) (193.8)
Pension and postretirement liability adjustments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 44.7 50.8
Ownership changes 0.0 0.0
Other comprehensive income (loss) before reclassifications and income taxes (0.1) (0.2)
Amounts reclassified from accumulated other comprehensive (loss) income, before income tax (7.9) (7.9)
Income tax (expense) benefit 2.0 2.0
Net current period other comprehensive income (loss), net of income taxes and ownership changes (6.0) (6.1)
Noncontrolling interest 0.0 0.0
Net current period comprehensive income (loss), net of income taxes, noncontrolling interest and ownership changes (6.0) (6.1)
Ending balance 38.7 44.7
Change in fair value of derivative financial instruments    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 2.2 3.0
Ownership changes 0.0 0.0
Other comprehensive income (loss) before reclassifications and income taxes 5.5 (2.0)
Amounts reclassified from accumulated other comprehensive (loss) income, before income tax (2.5) 0.9
Income tax (expense) benefit (1.0) 0.3
Net current period other comprehensive income (loss), net of income taxes and ownership changes 2.0 (0.8)
Noncontrolling interest 0.0 0.0
Net current period comprehensive income (loss), net of income taxes, noncontrolling interest and ownership changes 2.0 (0.8)
Ending balance $ 4.2 $ 2.2