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Business Segments - Summary of Operating Results by Reportable Segment (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Revenue: |  |  |  |
Total revenue | $ 1,070 | $ 1,113 | $ 3,099 | $ 3,255
Operating profit: |  |  |  |
Total operating profit | 50 | 63 | 155 | 174
Operating profit %: |  |  |  |
Total operating profit % | 4.70% | 5.70% | 5.00% | 5.30%
United States (Member) |  |  |  |
Revenue: |  |  |  |
Total revenue | 748 | 732 | 2,114 | 2,187
Operating profit: |  |  |  |
Total operating profit | 28 | 36 | 86 | 109
Operating profit %: |  |  |  |
Total operating profit % | 3.70% | 4.90% | 4.10% | 5.00%
Canada (Member) |  |  |  |
Revenue: |  |  |  |
Total revenue | 173 | 191 | 489 | 578
Operating profit: |  |  |  |
Total operating profit | 14 | 13 | 33 | 35
Operating profit %: |  |  |  |
Total operating profit % | 8.10% | 6.80% | 6.70% | 6.10%
International [Member] |  |  |  |
Revenue: |  |  |  |
Total revenue | 149 | 190 | 496 | 490
Operating profit: |  |  |  |
Total operating profit | $ 8 | $ 14 | $ 36 | $ 30
Operating profit %: |  |  |  |
Total operating profit % | 5.40% | 7.40% | 7.30% | 6.10%

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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