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Business Segments - Summary of Operating Results by Reportable Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Revenue: |  |  |  |
Total revenue | $ 370 | $ 776 | $ 974 | $ 1,561
Operating profit (loss): |  |  |  |
Total operating profit (loss) | (29) | 17 | (362) | 40
United States [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | 260 | 605 | 701 | 1,205
Operating profit (loss): |  |  |  |
Total operating profit (loss) | (24) | 16 | (228) | 35
Canada [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | 41 | 74 | 119 | 160
Operating profit (loss): |  |  |  |
Total operating profit (loss) | (5) | 1 | (63) | 3
International [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | $ 69 | $ 97 | 154 | 196
Operating profit (loss): |  |  |  |
Total operating profit (loss) |  |  | $ (71) | $ 2

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