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Other Assets - Schedule of Other Assets (Detail) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
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Other Assets [Abstract] |  |
Finance Lease, Right-of-Use Asset | $ 9 | $ 8
Deferred income taxes | 102 | 197
Overfunded pension plans | 110 | 101
Cash surrender value of life insurance contracts | 49 | 49
Other | 227 | 63
Total | $ 497 | $ 418

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