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Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at the beginning of period     $ 1,844.4  
Balance at end of period $ 1,916.7 $ 1,882.4 1,916.7 $ 1,882.4
Accumulated Other Comprehensive Loss        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at end of period (85.2) (90.1) (85.2) (90.1)
Cumulative foreign currency translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at the beginning of period (87.5) (82.6) (80.3) (84.1)
Other comprehensive gain (loss) before reclassifications 7.6 (6.9) 0.4 (5.4)
Balance at end of period (79.9) (89.5) (79.9) (89.5)
Unrealized net gain on cash flow derivatives        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at the beginning of period 0.0 3.3 0.7 4.9
Other comprehensive gain (loss) before reclassifications (0.6) 1.1 (0.2) 2.7
Reclassifications, net of tax (0.3) (1.9) (1.4) (5.1)
Balance at end of period (0.9) 2.5 (0.9) 2.5
Income tax benefit 0.1 0.6 0.5 1.6
Pension liability        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at the beginning of period (4.5) (3.1) (4.6) (3.2)
Reclassifications, net of tax 0.1 0.0 0.2 0.1
Balance at end of period (4.4) (3.1) (4.4) (3.1)
Actuarial losses 0.1 0.0 0.3 0.2
Income tax benefit 0.0 0.0 (0.1) (0.1)
Actuarial losses        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Actuarial losses $ 0.1 $ 0.0 0.2 0.1
Prior year service cost        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Actuarial losses     $ 0.1 $ 0.1