v3.22.4
Pension and Other Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Apr. 30, 2021
Dec. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Settlements     $ 47 $ 584 $ 199
Pension benefits​          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost     16 21 21
Interest cost     75 63 108
Expected return on plan assets     (87) (110) (170)
Amortization of net actuarial loss     74 94 123
Amortization of prior service benefit     3 0 0
Settlements     47 584 199
Net periodic benefit cost     128 652 281
Settlements     78 1,051  
Pension benefits​ | United States          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Settlements       (549)  
Net periodic benefit cost     127 653  
Settlements $ (995) $ (240)      
Defined benefit plan, plan assets, transfer of plan assets $ (1,007) $ (245)      
Defined Benefit Plan, Net Periodic Benefit Cost Lump Sum Benefits       35  
Other postretirement benefits          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost     5 6 5
Interest cost     10 11 13
Expected return on plan assets     0 0 0
Amortization of net actuarial loss     8 8 8
Amortization of prior service benefit     (8) (6) (4)
Settlements     0 0 0
Net periodic benefit cost     15 19 $ 22
Settlements     $ 0 $ 0