v3.26.1
Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Stockholders' equity attributable to parent, beginning balance $ 7,976  
Stockholders' equity attributable to parent, ending balance 7,977  
Foreign currency translation [Member]    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Stockholders' equity attributable to parent, beginning balance (608) $ (1,020)
Other comprehensive (loss)/income before reclassifications (62) 109
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 0 0
Net other comprehensive (loss)/income (62) 109
Stockholders' equity attributable to parent, ending balance (670) (911)
Derivative instruments [Member]    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Stockholders' equity attributable to parent, beginning balance [1] 10 7
Other comprehensive (loss)/income before reclassifications [1] (1) 3
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) [1] (1) 0
Net other comprehensive (loss)/income [1] (2) 3
Stockholders' equity attributable to parent, ending balance [1] 8 10
Defined pension and post-retirement benefit costs [Member]    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Stockholders' equity attributable to parent, beginning balance (2,236) (2,145)
Other comprehensive (loss)/income before reclassifications 2 92
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 26 19
Net other comprehensive (loss)/income 28 111
Stockholders' equity attributable to parent, ending balance (2,208) (2,034)
Total [Member]    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Stockholders' equity attributable to parent, beginning balance (2,834) (3,158)
Other comprehensive (loss)/income before reclassifications (61) 204
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 25 19
Net other comprehensive (loss)/income (36) 223
Stockholders' equity attributable to parent, ending balance $ (2,870) $ (2,935)
[1] Reclassification adjustments from accumulated other comprehensive loss related to derivative instruments are included in Revenue and Salaries and benefits in the accompanying condensed consolidated statements of comprehensive income. See Note 8 — Derivative Financial Instruments for additional details regarding the reclassification adjustments for the derivative settlements.