Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details)

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Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
U.S. | Postretirement Health and Life Plans      
Components of net periodic benefit cost (income)      
Service cost $ 5 $ 5 $ 5
Interest cost 24 32 38
Expected return on plan assets (3) (4) (5)
Amortization of net actuarial loss 20 29 (24)
Other 0 (2) (2)
Net periodic benefit cost (income) $ 46 $ 60 $ 12
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 2.48% 3.27% 4.25%
Expected return on plan assets 2.00% 2.00% 2.00%
U.S. | Qualified | Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 0 $ 0 $ 0
Interest cost 414 500 593
Expected return on plan assets (1,173) (1,154) (1,088)
Amortization of net actuarial loss 193 173 135
Other 0 0 0
Net periodic benefit cost (income) $ (566) $ (481) $ (360)
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 2.57% 3.32% 4.32%
Expected return on plan assets 5.75% 6.00% 6.00%
U.S. | Nonqualified | Other Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 0 $ 1 $ 1
Interest cost 67 90 113
Expected return on plan assets (49) (71) (95)
Amortization of net actuarial loss 63 50 34
Other 0 0 0
Net periodic benefit cost (income) $ 81 $ 70 $ 53
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 2.33% 3.20% 4.26%
Expected return on plan assets 1.88% 2.77% 3.73%
Rate of compensation increase 4.00% 4.00% 4.00%
Non-U.S. | Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 28 $ 20 $ 17
Interest cost 45 49 65
Expected return on plan assets (70) (66) (99)
Amortization of net actuarial loss 19 9 6
Other 5 8 4
Net periodic benefit cost (income) $ 27 $ 20 $ (7)
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 1.35% 1.81% 2.60%
Expected return on plan assets 2.30% 2.57% 4.13%
Rate of compensation increase 4.11% 4.10% 4.49%