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v3.23.3

Employee Benefit Plans (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
PRB plans | $ 8 | $ 8 | $ 20 | $ 18 |
Defined contribution plans | 296 | 230 | 985 | 792 |
Liability, Defined Benefit Plan, Current | 307 |  | 307 |  | $ 307
Liability, Defined Benefit Pension Plan, Noncurrent | 4,457 |  | 4,457 |  | 4,807
Non-service pension income | (443) | (468) | (1,334) | (1,422) |
Total net periodic benefit (income) expense |  |  | (1,164) | (1,062) |
Marketable securities held in trusts | 737 |  | 737 |  | 774
UNITED STATES |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Defined benefit plans | 9 | 0 | 9 | 0 |
Foreign Plan |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Defined benefit plans | 13 | 18 | 42 | 48 |
Pension Plan [Member] |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Assets for Plan Benefits, Defined Benefit Plan | 3,996 |  | 3,996 |  | 3,301
Liability, Defined Benefit Pension Plan, Noncurrent | 3,816 |  | 3,816 |  | 4,133
Service cost | 56 | 118 | 167 | 354 |
Interest cost | 627 | 380 | 1,880 | 1,142 |
Expected return on plan assets | (940) | (883) | (2,815) | (2,661) |
Amortization of prior service credit | (39) | (40) | (118) | (123) |
Recognized actuarial net (gain) loss | (94) | 76 | (284) | 230 |
Net settlement, curtailment, and special termination benefit (gain) loss | 4 | 0 | 6 | (6) |
Non-service pension income | (442) | (467) | (1,331) | (1,418) |
Total net periodic benefit (income) expense | (386) | (349) | (1,164) | (1,064) |
Other Postretirement Benefits Plan [Member] |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Liability, Defined Benefit Pension Plan, Noncurrent | 581 |  | 581 |  | 611
Service cost | 1 | 2 | 3 | 6 |
Interest cost | 12 | 7 | 36 | 21 |
Expected return on plan assets | (5) | (5) | (15) | (16) |
Amortization of prior service credit | 0 | 0 | 0 | 0 |
Recognized actuarial net (gain) loss | (8) | (3) | (24) | (9) |
Net settlement, curtailment, and special termination benefit (gain) loss | 0 | 0 | 0 | 0 |
Non-service pension income | (1) | (1) | (3) | (4) |
Total net periodic benefit (income) expense | 0 | $ 1 | 0 | $ 2 |
Other pension and PRB related items |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Liability, Defined Benefit Pension Plan, Noncurrent | $ 60 |  | $ 60 |  | $ 63

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