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Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss Attributable to Controlling Interests (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]  
Beginning balance $ 20,179.6
Ending balance 23,056.3
Accumulated Other Comprehensive Loss  
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]  
Beginning balance (1,151.1)
Net change in period 650.8
Ending balance (500.3)
Pension Liability  
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]  
Beginning balance (23.2)
Net change in period (4.7)
Ending balance (27.9)
Foreign Currency Translation  
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]  
Beginning balance (1,232.8)
Net change in period 644.9
Ending balance (587.9)
Fair Value of Derivative Investments  
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]  
Beginning balance 104.9
Net change in period 10.6
Ending balance $ 115.5