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Accumulated Other Comprehensive Income (Loss) - After-Tax Components of and Changes in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance $ 2,914.8 $ 2,924.4 $ 3,064.8 $ 2,775.5
Ending Balance 2,952.4 3,043.5 2,952.4 3,043.5
Foreign Currency Adjustments [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance 14.9 13.0 3.3 7.2
Amounts classified into accumulated other comprehensive (loss) income (27.7) 12.0 (16.1) 17.8
Net current period other comprehensive (loss) income (27.7) 12.0 (16.1) 17.8
Ending Balance 12.8 25.0 12.8 25.0
Derivative Hedging Gain (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance 51.0 2.7 2.9 4.2
Amounts classified into accumulated other comprehensive (loss) income (23.2) 1.5 72.4 (0.3)
Amounts reclassified from accumulated other comprehensive (loss) income 2.7 (0.9) 3.8 (0.6)
Net current period other comprehensive (loss) income (20.5) 0.6 68.6 (0.9)
Ending Balance 71.5 3.3 71.5 3.3
Defined Benefit Plan Adjustments [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance (30.6) (66.7) (30.8) (66.5)
Amounts classified into accumulated other comprehensive (loss) income (0.3)   (0.1) (0.2)
Net current period other comprehensive (loss) income (0.3)   (0.1) (0.2)
Ending Balance (30.9) (66.7) (30.9) (66.7)
Accumulated Other Comprehensive Loss [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning Balance 35.3 (51.0) (24.6) (55.1)
Amounts classified into accumulated other comprehensive (loss) income (4.8) 13.5 56.2 17.3
Amounts reclassified from accumulated other comprehensive (loss) income 2.7 (0.9) 3.8 (0.6)
Net current period other comprehensive (loss) income (7.5) 12.6 52.4 16.7
Ending Balance $ 27.8 $ (38.4) $ 27.8 $ (38.4)