v3.26.1
Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance     $ 19,264.0  
Reclassified out of AOCI $ 20.7 $ 111.4 79.2 $ 165.9
Net other comprehensive income (loss) (13.3) 393.4 (5.3) 543.6
Ending balance 20,321.3 18,942.6 20,321.3 18,942.6
Derivative Contracts        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 14.5 17.1 3.4 32.5
Recorded into AOCI (28.5) (123.2) (74.0) (192.4)
Reclassified out of AOCI 19.6 111.0 76.2 164.8
Net other comprehensive income (loss) (8.9) (12.2) 2.2 (27.6)
Ending balance 5.6 4.9 5.6 4.9
Marketable Debt Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 3.3 10.6 19.2 (0.7)
Recorded into AOCI (6.0) 6.0 (22.5) 17.4
Reclassified out of AOCI 0.2 0.1 0.8  
Net other comprehensive income (loss) (5.8) 6.1 (21.7) 17.4
Ending balance (2.5) 16.7 (2.5) 16.7
Pension Plans        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 281.1 70.1 280.9 69.7
Recorded into AOCI   (0.5) (1.1) (0.9)
Reclassified out of AOCI 0.9 0.3 2.2 1.1
Net other comprehensive income (loss) 0.9 (0.2) 1.1 0.2
Ending balance 282.0 69.9 282.0 69.9
Foreign Currency Translation        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (627.6) (1,060.9) (640.2) (1,214.8)
Recorded into AOCI 0.5 399.7 13.1 553.6
Net other comprehensive income (loss) 0.5 399.7 13.1 553.6
Ending balance (627.1) (661.2) (627.1) (661.2)
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (328.7) (963.1) (336.7) (1,113.3)
Recorded into AOCI (34.0) 282.0 (84.5) 377.7
Reclassified out of AOCI 20.7 111.4 79.2 165.9
Net other comprehensive income (loss) (13.3) 393.4 (5.3) 543.6
Ending balance $ (342.0) $ (569.7) $ (342.0) $ (569.7)