v3.22.4

Pension and Other Postretirement Benefits - Pension Plan Benefit Obligations (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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The aggregate projected benefit obligation and fair value of plan assets for defined benefit pension plans with projected benefit obligations in excess of plan assets was as follows: |  |  |
Projected benefit obligation | $ 1,759 | $ 2,472 |
Fair value of plan assets | 1,167 | 1,747 |
Pension benefits​ |  |  |
The projected benefit obligation and accumulated benefit obligation for all defined benefit pension plans was as follows: |  |  |
Projected benefit obligation | 1,961 | 2,817 | $ 4,081
Accumulated benefit obligation | 1,956 | 2,807 |
The aggregate accumulated benefit obligation and fair value of plan assets for defined benefit pension plans with accumulated benefit obligations in excess of plan assets was as follows: |  |  |
Accumulated benefit obligation | 1,755 | 2,464 |
Fair value of plan assets | $ 1,167 | $ 1,747 |

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