v3.22.4

Pension and Other Postretirement Benefits - Narrative (Details) $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2020 participant | Jul. 01, 2020 USD ($) participant | May 31, 2020 participant | Apr. 30, 2021 USD ($) plan participant | Dec. 31, 2020 USD ($) segment participant | Jul. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) participant | Jun. 30, 2021 plan participant | Jun. 30, 2020 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2022 | May 31, 2022 USD ($) | May 14, 2022 claimant | Aug. 31, 2021 USD ($) | Apr. 01, 2020 USD ($) | Jan. 01, 2020 USD ($) | Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement plans, accumulated other comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50 |  |
Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65 |  |
Noncurrent liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15 |  |
Weighted average duration of projected plan cash flows under yield curve model |  |  |  |  |  |  |  |  |  |  |  | 11 years |  |  |  |  |  |  |  |  |
Cash contributions to pension plans |  |  |  |  |  |  |  |  |  |  |  | $ 31 | $ 458 | $ 271 |  |  |  |  |  |  |
Defined contribution plan, cost |  |  |  |  |  |  |  |  |  |  |  | 45 | 39 | 35 |  |  |  |  |  |  |
Accrued pension benefits |  |  |  |  |  |  |  |  |  |  |  | 586 | 717 |  |  |  |  |  |  |  |
Settlements related to employee retirement benefit plans |  |  |  |  |  |  |  |  |  |  |  | (47) | (584) | (199) |  |  |  |  |  |  |
Labor Agreement, Number of Employees | claimant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,300 |  |  |  |
Labor Agreement, One Time Signing Bonus |  |  |  |  |  |  |  |  |  |  |  | 19 |  |  |  |  |  |  |  |  |
Forecast | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  |  |  |  |  |  |  |  | 5.50% |  |  |  |  |  |  |  |  |  |
Forecast | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  |  |  |  |  |  |  |  | 6.50% |  |  |  |  |  |  |  |  |  |
Funded |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash contributions to pension plans |  |  |  |  |  |  |  |  |  |  |  | 31 | 458 | 271 |  |  |  |  |  |  |
U.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement plans, liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,920 |
Retirement plan, current liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60 |
Projected benefit obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,255 |
Retirement plans, plan asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,335 |
Retirement plans, accumulated other comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,752 |
Pension benefits​ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement plan, current liability |  |  |  |  |  |  |  |  |  |  |  | 7 | 8 |  |  |  |  |  |  |  |
Projected benefit obligation |  |  |  |  | $ 4,081 |  |  |  |  |  |  | 1,961 | 2,817 | 4,081 |  |  |  |  |  |  |
Retirement plans, plan asset |  |  |  |  | $ 2,754 |  |  |  |  |  |  | 1,383 | 2,124 | $ 2,754 |  |  |  |  |  |  |
Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  | 15 | 32 |  |  |  |  |  |  |  |
Noncurrent liability |  |  |  |  |  |  |  |  |  |  |  | 586 | 717 |  |  |  |  |  |  |  |
Settlement of plan obligations |  |  |  |  |  |  |  |  |  |  |  | (78) | (1,051) |  |  |  |  |  |  |  |
Contributions by employer |  |  |  |  |  |  |  |  |  |  |  | $ 31 | $ 458 |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  |  |  |  |  |  |  |  | 5.49% | 2.76% |  |  |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  |  |  |  |  |  |  |  |  | 5.18% | 4.91% | 6.09% |  |  |  |  |  |  |
Settlements related to employee retirement benefit plans |  |  |  |  |  |  |  |  |  |  |  | $ (47) | $ (584) | $ (199) |  |  |  |  |  |  |
Pension benefits​ | Funded | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum required contribution to pension plans in 2021 |  |  |  |  |  |  |  |  |  |  | $ 38 |  |  |  |  |  |  |  |  |  |
Pension benefits​ | U.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation |  |  |  | $ 3,337 |  |  |  |  |  |  |  | 1,716 | 2,398 |  |  |  |  |  |  |  |
Retirement plans, plan asset |  |  |  | 2,790 |  |  |  |  |  |  |  | 1,167 | 1,744 |  |  |  |  |  |  |  |
Retirement plans, accumulated other comprehensive loss |  |  |  | $ (117) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, number of participants | participant | 30,000 |  |  | 8,400 | 7,000 |  |  | 23,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement of plan obligations |  |  |  | $ 995 | $ 240 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, plan assets, transfer of plan assets |  |  |  | 1,007 | $ 245 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions by employer |  |  |  | $ 250 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  | 3.10% | 2.54% |  |  |  |  |  |  |  |  | 2.54% |  |  |  |  |  |  |
Settlement charge |  |  |  |  | $ (140) |  |  |  |  |  |  |  | 549 |  |  |  |  |  |  |  |
Settlement charge, after-tax |  |  |  |  | $ 108 |  |  |  |  |  |  |  | 423 |  |  |  |  |  |  |  |
Number of plans with obligations transferred to insurance company | segment |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of defined benefit pension plans | plan |  |  |  | 2 |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued pension benefits |  |  |  | $ 152 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlements related to employee retirement benefit plans |  |  |  |  |  |  |  |  |  |  |  |  | $ 549 |  |  |  |  |  |  |  |
Pension benefits​ | U.S. | Hourly Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  |  |  |  |  |  |  |  |  | 2.96% |  |  | 4.66% |  |  |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost, (Increase) Decrease for Remeasurement due to Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8 |  |  |  |  |
Defined Benefit Plan, Change in amounts for Asset (Liability) Recognized in Statement of Financial Position |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |  |  |  |
Defined Benefit Plan, Service Cost, (Increase) Decrease for Remeasurement due to Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Defined Benefit Plan, Non-service Cost, (Increase) Decrease for Remeasurement due to Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10 |  |  |  |  |
Pension benefits​ | U.S. | Salaried Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  |  |  |  |  |  |  |  |  | 2.82% |  | 5.71% |  |  |  |  |  |
Settlement charge |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |  |  |  |  |  |
Settlement charge, after-tax |  |  |  |  |  |  |  |  |  |  |  | (12) |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |  |  |  |  |  |  |  |  |  |  |  | 26 |  |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost, (Increase) Decrease for Remeasurement due to Amendment |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |
Defined Benefit Plan, Change in amounts for Asset (Liability) Recognized in Statement of Financial Position |  |  |  |  |  |  |  |  |  |  |  | 34 |  |  |  |  |  |  |  |  |
Pension benefits​ | U.S. | Funded | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum required contribution to pension plans in 2021 |  |  |  |  |  |  |  |  |  |  | $ 31 |  |  |  |  |  |  |  |  |  |
Pension benefits​ | U.K. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation |  | $ 240 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement plans, plan asset |  | $ 260 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, number of participants | participant |  | 1,050 | 3,350 |  |  |  | 1,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement of plan obligations |  |  |  |  |  |  | $ 400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, plan assets, transfer of plan assets |  |  |  |  |  |  | $ 460 |  |  |  |  |  |  | $ 58 |  |  |  |  |  |  |
Contributions by employer |  |  |  |  |  |  |  |  | $ 10 |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  |  |  | 1.55% |  | 1.55% |  |  |  |  |  |  |  |  |  |  |  | 2.05%
Net reduction to remaining plan obligations due to remeasurement of plan |  |  |  |  |  |  |  |  |  | $ 250 |  |  |  |  |  |  |  |  |  |  |
Settlement charge |  |  |  |  |  |  |  |  |  |  |  |  |  | (58) |  |  |  |  |  |  |
Settlement charge, after-tax |  |  |  |  |  |  |  |  |  |  |  |  |  | 48 |  |  |  |  |  |  |
Other postretirement benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement plan, current liability |  |  |  |  |  |  |  |  |  |  |  | 27 | $ 29 |  |  |  |  |  |  |  |
Projected benefit obligation |  |  |  |  | $ 514 |  |  |  |  |  |  | 329 | 440 | 514 |  |  |  |  |  |  |
Retirement plans, plan asset |  |  |  |  | $ 0 |  |  |  |  |  |  | 0 | 0 | 0 |  |  |  |  |  |  |
Noncurrent assets |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |  |
Noncurrent liability |  |  |  |  |  |  |  |  |  |  |  | 302 | 411 |  |  |  |  |  |  |  |
Settlement of plan obligations |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |  |
Contributions by employer |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  |  |  |  |  |  |  |  | 5.62% | 2.90% |  |  |  |  |  |  |  |
Settlements related to employee retirement benefit plans |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |
Other postretirement benefits | U.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit plan, discount rate |  |  |  |  | 2.61% | 2.54% |  |  |  |  |  |  |  | 2.61% |  |  |  | 2.78% |  |  | 3.17%
Net decrease to postretirement benefits liability |  |  |  |  |  | $ 7 |  |  |  |  |  | $ 34 |  |  |  |  |  |  |  |  |
Net decrease to Accumulated other comprehensive loss (after-tax) |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in estimated annual benefit payments beginning in 2021 |  |  |  |  |  | $ 20 |  |  |  |  |  |  |  |  |  |  |  | $ (4) |  |  |
Health care cost trend rate assumed for next year |  |  |  |  |  |  |  |  |  |  |  | 6.30% | 4.50% |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |  |  |  |  |  |  |  |  |  |  |  | $ 26 |  |  |  |  |  |  |  |  |
Other postretirement benefits | U.S. | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Health care cost trend rate assumed for next year |  |  |  |  |  |  |  |  |  |  | 6.30% |  |  |  |  |  |  |  |  |  |

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