XML 55 R44.htm IDEA: XBRL DOCUMENT v3.21.2
Pensions and Other Postretirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 11 $ 10 $ 22 $ 20
Interest cost 14 18 27 37
Expected return on plan assets (48) (47) (96) (95)
Amortization of net losses 16 13 33 26
Amortization of prior service benefit 0 0 0 0
Net benefit (7) (6) (14) (12)
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 2 3 3
Interest cost 2 3 4 6
Expected return on plan assets (3) (3) (6) (6)
Amortization of net losses 1 0 1 0
Amortization of prior service benefit (7) (7) (13) (13)
Net benefit $ (6) $ (5) $ (11) $ (10)