v3.23.1
Pensions and Other Postretirement Benefits (Net Periodic Benefit Costs) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Pension settlement charge $ 190 $ 0
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 2 2
Interest cost 31 19
Expected return on plan assets (31) (36)
Amortization of actuarial losses 7 8
Amortization of prior service credit 0 0
Pension settlement charge 190 0
Net periodic benefit cost/(income) 199 (7)
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1 3
Interest cost 7 4
Expected return on plan assets 0 0
Amortization of actuarial losses 0 4
Amortization of prior service credit (2) (3)
Pension settlement charge 0 0
Net periodic benefit cost/(income) $ 6 $ 8