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, 2023
Dec. 31, 2022
Dec. 31, 2021
U.S. | Postretirement Health and Life Plans      
Components of net periodic benefit cost (income)      
Service cost $ 2 $ 4 $ 5
Interest cost 36 25 24
Expected return on plan assets (2) (2) (3)
Amortization of actuarial loss (gain) and prior service cost (78) (9) 20
Other 0 0 0
Net periodic benefit cost (income) $ (42) $ 18 $ 46
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 5.56% 2.85% 2.48%
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 616 438 414
Expected return on plan assets (1,191) (1,204) (1,173)
Amortization of actuarial loss (gain) and prior service cost 94 140 193
Other 0 0 0
Net periodic benefit cost (income) $ (481) $ (626) $ (566)
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 5.54% 2.86% 2.57%
Expected return on plan assets 6.50% 5.75% 5.75%
U.S. | Nonqualified | Other Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 0 $ 0 $ 0
Interest cost 111 74 67
Expected return on plan assets (97) (59) (49)
Amortization of actuarial loss (gain) and prior service cost 29 54 63
Other 0 1 0
Net periodic benefit cost (income) $ 43 $ 70 $ 81
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 5.58% 2.80% 2.33%
Expected return on plan assets 4.98% 2.38% 1.88%
Rate of compensation increase 4.00% 4.00% 4.00%
Non-U.S. | Pension Plan      
Components of net periodic benefit cost (income)      
Service cost $ 27 $ 29 $ 28
Interest cost 80 53 45
Expected return on plan assets (72) (59) (70)
Amortization of actuarial loss (gain) and prior service cost 11 14 19
Other 1 10 5
Net periodic benefit cost (income) $ 47 $ 47 $ 27
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 4.59% 1.85% 1.35%
Expected return on plan assets 4.17% 2.17% 2.30%
Rate of compensation increase 4.25% 4.46% 4.11%