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Employee Benefit Plans - Estimated Future Benefit Payments (Detail) $ in Millions | Dec. 31, 2018 USD ($)
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Pension |
Defined Benefit Plan Disclosure [Line Items] |
2019 | $ 3
2020 | 4
2021 | 5
2022 | 5
2023 | 5
2024-2028 | 31
Post Employment Benefit |
Defined Benefit Plan Disclosure [Line Items] |
2019 | 9
2020 | 9
2021 | 9
2022 | 9
2023 | 9
2024-2028 | $ 44

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