v3.26.1
Stock Plans: (Compensation Expense and Respective Tax Benefit (Charge) for Performance Share Unit Awards) (Details) - Performance Shares - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Compensation Expense related to PSU Awards $ 7 $ 9 $ 53 $ 60
Tax Benefit/(Charge) Related to PSU Awards $ 5 $ 1 $ 27 $ 17