XML 55 R44.htm IDEA: XBRL DOCUMENT v3.21.2
Pensions and Other Postretirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 10 $ 10 $ 32 $ 30
Interest cost 14 19 41 56
Expected return on plan assets (48) (48) (144) (143)
Amortization of net losses 16 13 49 39
Amortization of prior service benefit 0 0 0 0
Net benefit (8) (6) (22) (18)
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 2 4 5
Interest cost 1 3 5 9
Expected return on plan assets (3) (4) (9) (10)
Amortization of net losses 0 0 1 0
Amortization of prior service benefit (6) (6) (19) (19)
Net benefit $ (7) $ (5) $ (18) $ (15)