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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, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenue: |  |  |  |
Total revenue | $ 776 | $ 777 | $ 1,561 | $ 1,541
Operating profit: |  |  |  |
Total operating loss | $ 17 | $ 18 | $ 40 | $ 25
Operating profit % of revenue: |  |  |  |
Total operating profit % | 2.20% | 2.30% | 2.60% | 1.60%
United States [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | $ 605 | $ 600 | $ 1,205 | $ 1,162
Operating profit: |  |  |  |
Total operating loss | $ 16 | $ 16 | $ 35 | $ 19
Operating profit % of revenue: |  |  |  |
Total operating profit % | 2.60% | 2.70% | 2.90% | 1.60%
Canada [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | $ 74 | $ 75 | $ 160 | $ 177
Operating profit: |  |  |  |
Total operating loss | $ 1 | $ 1 | $ 3 | $ 5
Operating profit % of revenue: |  |  |  |
Total operating profit % | 1.40% | 1.30% | 1.90% | 2.80%
International [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | $ 97 | $ 102 | $ 196 | $ 202
Operating profit: |  |  |  |
Total operating loss |  | $ 1 | $ 2 | $ 1
Operating profit % of revenue: |  |  |  |
Total operating profit % | 0.00% | 1.00% | 1.00% | 0.50%

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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