v3.26.1
Derivative Instruments and Hedging Activities - Gross Unrealized Losses from Derivative Instruments (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain / (Loss) Recognized in AOCI $ 13.2 $ (34.2) $ 36.9 $ (67.0)
Amount of Gain / (Loss) Reclassified from AOCI 8.4 15.5 16.0 36.3
Cash Flow Hedges [Member]        
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain / (Loss) Recognized in AOCI 13.2 (34.2) 36.9 (67.0)
Amount of Gain / (Loss) Reclassified from AOCI 8.4 15.5 16.0 36.3
Cash Flow Hedges [Member] | Foreign Exchange Forward Contracts [Member]        
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain / (Loss) Recognized in AOCI 13.2 (34.2) 36.9 (67.0)
Amount of Gain / (Loss) Reclassified from AOCI 8.6 15.7 16.4 36.7
Cash Flow Hedges [Member] | Forward Starting Interest Rate Swaps [Member]        
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain / (Loss) Reclassified from AOCI $ (0.2) $ (0.2) $ (0.4) $ (0.4)