v3.26.3
Accumulated Other Comprehensive Income/Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net year-to-date other comprehensive income/(loss), taxes $ (0.5) $ 0.1 $ (0.6) $ (1.8)
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 20,673.0 16,258.0 18,467.0 16,890.0
Other comprehensive income/(loss) before reclassifications 18.0 22.0 52.0 53.0
Amounts reclassified from accumulated other comprehensive income/(loss) (1.0) (2.0) 0.0 (2.0)
Total other comprehensive income/(loss) 17.0 [1] 20.0 [1] 52.0 [2] 51.0 [2]
Ending balance 22,018.0 17,304.0 22,018.0 17,304.0
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance [3] (556.0) (692.0) (591.0) (723.0)
Total other comprehensive income/(loss) [3] 17.0 20.0 52.0 51.0
Ending balance [3] (539.0) (672.0) (539.0) (672.0)
Defined benefit plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (428.0) (497.0) (427.0) (498.0)
Other comprehensive income/(loss) before reclassifications 3.0 1.0 0.0 2.0
Amounts reclassified from accumulated other comprehensive income/(loss) (1.0) (2.0) 1.0 (2.0)
Total other comprehensive income/(loss) 2.0 (1.0) 1.0 0.0
Ending balance (426.0) (498.0) (426.0) (498.0)
Foreign currency translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (142.0) (211.0) (179.0) (241.0)
Other comprehensive income/(loss) before reclassifications 15.0 21.0 52.0 51.0
Amounts reclassified from accumulated other comprehensive income/(loss) 0.0 0.0 0.0 0.0
Total other comprehensive income/(loss) 15.0 21.0 52.0 51.0
Ending balance (127.0) (190.0) (127.0) (190.0)
Derivative instruments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 14.0 16.0 15.0 16.0
Other comprehensive income/(loss) before reclassifications 0.0 0.0 0.0 0.0
Amounts reclassified from accumulated other comprehensive income/(loss) 0.0 0.0 (1.0) 0.0
Total other comprehensive income/(loss) 0.0 0.0 (1.0) 0.0
Ending balance $ 14.0 $ 16.0 $ 14.0 $ 16.0
[1] Net of deferred taxes of ($0.5) million and $0.1 million during the three months ended September 30, 2026 and 2025, respectively.
[2] Net of deferred taxes of ($0.6) million and ($1.8) million during the nine months ended September 30, 2026 and 2025, respectively.
[3] AOCI = accumulated other comprehensive income/loss (Note 9)