v3.26.1
Accumulated Other Comprehensive Loss - Schedule of 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
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 $ 7,688   7,688  
Foreign currency translation [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Stockholders' equity attributable to parent, beginning balance (670) $ (911) (608) $ (1,020)
Other comprehensive (loss)/income before reclassifications (7) 207 (69) 316
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 0 0 0 0
Net other comprehensive (loss)/income (7) 207 (69) 316
Stockholders' equity attributable to parent, ending balance (677) (704) (677) (704)
Derivative instruments [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Stockholders' equity attributable to parent, beginning balance [1] 8 10 10 7
Other comprehensive (loss)/income before reclassifications [1] 0 5 (1) 8
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) [1] 0 (1) (1) (1)
Net other comprehensive (loss)/income [1] 0 4 (2) 7
Stockholders' equity attributable to parent, ending balance [1] 8 14 8 14
Defined pension and post-retirement benefit costs [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Stockholders' equity attributable to parent, beginning balance (2,208) (2,034) (2,236) (2,145)
Other comprehensive (loss)/income before reclassifications 2 (1) 4 91
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 26 19 52 38
Net other comprehensive (loss)/income 28 18 56 129
Stockholders' equity attributable to parent, ending balance (2,180) (2,016) (2,180) (2,016)
Total [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Stockholders' equity attributable to parent, beginning balance (2,870) (2,935) (2,834) (3,158)
Other comprehensive (loss)/income before reclassifications (5) 211 (66) 415
(Gain)/loss reclassified from accumulated other comprehensive loss (net of income tax) 26 18 51 37
Net other comprehensive (loss)/income 21 229 (15) 452
Stockholders' equity attributable to parent, ending balance $ (2,849) $ (2,706) $ (2,849) $ (2,706)
[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.

The impact of our available-for-sale debt securities on accumulated other comprehensive loss was not material for the three and six months ended June 30, 2026.