XML 49 R37.htm IDEA: XBRL DOCUMENT v3.20.2
Pension and Other Post-Employment Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Feb. 01, 2019
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Mark-to-market adjustment     $ 423      
Decrease in discount rate     (0.38%)      
Contributions by employer $ 500          
Pension            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Service costs   $ 47   $ 48 $ 147 $ 144
Interest costs   71   93 216 279
Expected return on plan assets   (156)   (135) (464) (405)
Amortization of prior service costs (credits)   1   2 12 6
Special termination costs         0 14
One-time termination benefit         8 0
Pension and OPEB mark-to-market adjustment         386 0
Net periodic costs (credits), including amounts capitalized   (37)   8 305 38
Net periodic credits, recognized in earnings   (56)   (11) 240 (19)
Net accelerated credits     $ 18      
OPEB            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Service costs   1   1 3 3
Interest costs   4   6 12 16
Expected return on plan assets   (9)   (7) (25) (21)
Amortization of prior service costs (credits)   (4)   (9) (42) (27)
Special termination costs         0 0
One-time termination benefit         0 0
Pension and OPEB mark-to-market adjustment         37 0
Net periodic costs (credits), including amounts capitalized   (8)   (9) (15) (29)
Net periodic credits, recognized in earnings   $ (8)   $ (10) $ (15) $ (30)