v3.26.1
AOCL (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 2,046 $ 2,056 $ 2,046 $ 2,056   $ 2,016    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (55) (53) (55) (53) $ (54) (55) $ (53) $ (52)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax (1) 0 0 (1)        
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (1,226) (1,271) (1,226) (1,271) (1,241) (1,256) (1,281) (1,292)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 19 14 39 28        
Reclassification from AOCI, Current Period, Tax (4) (4) (9) (7)        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 15 10 30 21        
AOCI Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ (1,281) $ (1,324) $ (1,281) $ (1,324) $ (1,295) $ (1,311) $ (1,334) $ (1,344)