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Pension and Postretirement Benefit Plans - Future Benefit Payments (Details) - Funded $ in Millions | Dec. 31, 2018 USD ($)
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Qualified and Non-qualified Pension Benefits | United States |
Future Pension and Postretirement Benefit Payments |
2019 Benefit Payments | $ 1,094
2020 Benefit Payments | 1,097
2021 Benefit Payments | 1,105
2022 Benefit Payments | 1,117
2023 Benefit Payments | 1,130
Next five years | 5,683
Qualified and Non-qualified Pension Benefits | International |
Future Pension and Postretirement Benefit Payments |
2019 Benefit Payments | 240
2020 Benefit Payments | 242
2021 Benefit Payments | 258
2022 Benefit Payments | 269
2023 Benefit Payments | 289
Next five years | 1,623
Postretirement Benefits |
Future Pension and Postretirement Benefit Payments |
2019 Benefit Payments | 122
2020 Benefit Payments | 130
2021 Benefit Payments | 139
2022 Benefit Payments | 147
2023 Benefit Payments | 157
Next five years | $ 842

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