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Pension and Other Postretirement Benefit Plans - Summary of Expected Benefit Payments (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | $ 84
2023 | 85
2024 | 87
2025 | 89
2026 | 90
2027 — 2031 | 469
United States | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | 724
2023 | 745
2024 | 731
2025 | 748
2026 | 770
2027 — 2031 | 4,230
International | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2022 | 289
2023 | 275
2024 | 278
2025 | 280
2026 | 308
2027 — 2031 | $ 1,715

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