v3.25.3
AOCL (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 2,114 $ 2,171 $ 2,114 $ 2,171   $ 2,186    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (54) (54) (54) (54) $ (53) (52) $ (53) $ (53)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax (1) (1) (2) (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 (1,259) (1,259) (1,259) (1,259) (1,271) (1,292) (1,270) (1,290)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 15 14 43 41        
Reclassification from AOCI, Current Period, Tax (3) (3) (10) (10)        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 12 11 33 31        
AOCI Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ (1,313) $ (1,313) $ (1,313) $ (1,313) $ (1,324) $ (1,344) $ (1,323) $ (1,343)