XML 111 R95.htm IDEA: XBRL DOCUMENT v3.20.4
Employee Benefit Plans and Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Amortization of:          
Settlement loss and other $ 125 $ 116      
Pension Plans          
Defined Benefit Plan Disclosure [Line Items]          
Service cost     $ 22 $ 23 $ 25
Interest cost     44 74 71
Expected return on assets     (80) (99) (112)
Amortization of:          
Prior service cost (credit)     0 1 (1)
Actuarial loss (gain)     40 67 74
Settlement loss and other     125 125 1
Net periodic benefit cost (credit)     151 191 58
Healthcare          
Defined Benefit Plan Disclosure [Line Items]          
Service cost     4 5 6
Interest cost     10 14 24
Expected return on assets     (7) (7) (7)
Amortization of:          
Prior service cost (credit)     (130) (125) (82)
Actuarial loss (gain)     2 (2) 7
Settlement loss and other     0 0 0
Net periodic benefit cost (credit)     (121) (115) (52)
Other          
Defined Benefit Plan Disclosure [Line Items]          
Service cost     16 13 15
Interest cost     1 3 3
Expected return on assets     0 0 0
Amortization of:          
Prior service cost (credit)     0 1 1
Actuarial loss (gain)     5 14 4
Settlement loss and other     2 2 1
Net periodic benefit cost (credit)     $ 24 $ 33 $ 24