v3.26.1
Accumulated Other Comprehensive Income/Loss (Details) - 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]        
Net year-to-date other comprehensive income/(loss), taxes $ (0.0) $ (1.7) $ (0.1) $ (1.9)
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 19,418.0 16,039.0 18,467.0 16,890.0
Other comprehensive income/(loss) before reclassifications (4.0) 28.0 34.0 31.0
Amounts reclassified from accumulated other comprehensive income/(loss) 1.0 0.0 1.0 0.0
Total other comprehensive income/(loss) (3.0) [1] 28.0 [1] 35.0 [2] 31.0 [2]
Ending balance 20,673.0 16,258.0 20,673.0 16,258.0
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance [3] (553.0) (720.0) (591.0) (723.0)
Total other comprehensive income/(loss) [3] (3.0) 28.0 35.0 31.0
Ending balance [3] (556.0) (692.0) (556.0) (692.0)
Defined benefit plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (428.0) (495.0) (427.0) (498.0)
Other comprehensive income/(loss) before reclassifications (2.0) (2.0) (3.0) 1.0
Amounts reclassified from accumulated other comprehensive income/(loss) 2.0 0.0 2.0 0.0
Total other comprehensive income/(loss) 0.0 (2.0) (1.0) 1.0
Ending balance (428.0) (497.0) (428.0) (497.0)
Foreign currency translation        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (140.0) (241.0) (179.0) (241.0)
Other comprehensive income/(loss) before reclassifications (2.0) 30.0 37.0 30.0
Amounts reclassified from accumulated other comprehensive income/(loss) 0.0 0.0 0.0 0.0
Total other comprehensive income/(loss) (2.0) 30.0 37.0 30.0
Ending balance (142.0) (211.0) (142.0) (211.0)
Derivative instruments        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 15.0 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) (1.0) 0.0 (1.0) 0.0
Total other comprehensive income/(loss) (1.0) 0.0 (1.0) 0.0
Ending balance $ 14.0 $ 16.0 $ 14.0 $ 16.0
[1] Net of deferred taxes of $0.0 million and ($1.7) million during the three months ended June 30, 2026 and 2025, respectively.
[2] Net of deferred taxes of ($0.1) million and ($1.9) million during the six months ended June 30, 2026 and 2025, respectively.
[3] AOCI = accumulated other comprehensive income/loss (Note 9)