v3.22.4

Pension and Other Postretirement Benefits - Expected Benefit Payments (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 USD ($) plan | Jun. 30, 2021 plan | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Pension benefits​ |  |  |  |
Pension benefits and Net other postretirement benefits |  |  |  |
2023 |  |  | $ 142 |
2024 |  |  | 142 |
2025 |  |  | 143 |
2026 |  |  | 146 |
2027 |  |  | 145 |
2028 through 2032 |  |  | 719 |
Expected benefit payments |  |  | 1,437 |
Other postretirement benefits |  |  |  |
Contributions by employer |  |  | 31 | $ 458
Pension benefits​ | United States |  |  |  |
Other postretirement benefits |  |  |  |
Contributions by employer | $ 250 |  |  |
Number of defined benefit pension plans | plan | 2 | 2 |  |
Other postretirement benefits |  |  |  |
Pension benefits and Net other postretirement benefits |  |  |  |
2023 |  |  | 27 |
2024 |  |  | 27 |
2025 |  |  | 27 |
2026 |  |  | 27 |
2027 |  |  | 26 |
2028 through 2032 |  |  | 127 |
Expected benefit payments |  |  | 261 |
Other postretirement benefits |  |  |  |
Contributions by employer |  |  | $ 0 | $ 0

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