v3.25.2
Other Comprehensive Income (Loss) - Schedule of Component of Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     $ 14,271.6  
Ending balance $ 18,349.1   18,349.1  
Accumulated Other Comprehensive Loss        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (3,774.6) $ (4,299.5) (4,321.9) $ (4,327.0)
Other comprehensive income (loss) before reclassifications 36.4 (103.7) 535.8 (109.1)
Net amount reclassified from accumulated other comprehensive loss 22.2 24.7 70.1 57.6
Net other comprehensive income (loss) 58.6 (79.0) 605.9 (51.5)
Ending balance (3,716.0) (4,378.5) (3,716.0) (4,378.5)
Foreign Currency Translation Gains (Losses)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (1,823.6) (1,897.0) (2,389.6) (1,819.0)
Other comprehensive income (loss) before reclassifications 60.9 (104.6) 596.3 (192.8)
Net amount reclassified from accumulated other comprehensive loss 4.9 0.0 35.5 10.2
Net other comprehensive income (loss) 65.8 (104.6) 631.8 (182.6)
Ending balance (1,757.8) (2,001.6) (1,757.8) (2,001.6)
Net Unrealized Gains (Losses) on Available-For-Sale Securities        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (23.3) (30.9) (31.7) (26.2)
Other comprehensive income (loss) before reclassifications 2.0 (1.8) 9.8 (6.6)
Net amount reclassified from accumulated other comprehensive loss 0.0 0.1 0.6 0.2
Net other comprehensive income (loss) 2.0 (1.7) 10.4 (6.4)
Ending balance (21.3) (32.6) (21.3) (32.6)
Retirement Benefit Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (2,181.5) (2,658.7) (2,178.7) (2,697.3)
Other comprehensive income (loss) before reclassifications (28.6) 1.2 (47.6) 16.8
Net amount reclassified from accumulated other comprehensive loss 16.7 23.9 32.9 46.9
Net other comprehensive income (loss) (11.9) 25.1 (14.7) 63.7
Ending balance (2,193.4) (2,633.6) (2,193.4) (2,633.6)
Net Unrealized Gains (Losses) on Cash Flow Hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 253.8 287.1 278.1 215.5
Other comprehensive income (loss) before reclassifications 2.1 1.5 (22.7) 73.5
Net amount reclassified from accumulated other comprehensive loss 0.6 0.7 1.1 0.3
Net other comprehensive income (loss) 2.7 2.2 (21.6) 73.8
Ending balance $ 256.5 $ 289.3 $ 256.5 $ 289.3