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Stockholders' Equity (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Jan. 30, 2024
Nov. 05, 2019
Stockholders' Equity [Line Items]            
Amount authorized for stock repurchase program         $ 3,800 $ 3,200
Dividends paid $ 54 $ 53        
Accumulated other comprehensive income (loss) 5,147 4,773 $ 5,073 $ 4,666    
Benefit Plans            
Stockholders' Equity [Line Items]            
Accumulated other comprehensive income (loss) $ (52) $ (27) $ (53) $ (28)