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Stockholders' Equity - AOCL (Details) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period $ 559,000,000.0 $ 323,400,000
Foreign currency translation adjustments 29,700,000 (15,500,000)
Balance at end of period 2,741,700,000 326,600,000
Foreign Currency Translation    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (187,200,000) (135,500,000)
Foreign currency translation adjustments 29,700,000 (15,500,000)
Balance at end of period (157,500,000) (151,000,000.0)
Tax expense (benefits) 0 0
Net amount reclassified to earnings 0 0
Pensions    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period 400,000 (1,200,000)
Net change from period revaluations 600,000 (300,000)
Balance at end of period 1,000,000.0 $ (1,500,000)
Tax expense (benefits) $ 0