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Goodwill - Summary of Goodwill Identified by Segment (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning balance |  |  |  | $ 346,000,000 | $ 205,000,000 | $ 346,000,000
Additions |  |  |  |  | 117,000,000 | 276,000,000
Impairment | $ 0 | $ (138,000,000) | $ (255,000,000) | (255,000,000) |  | (393,000,000)
Currency translation adjustments and other |  |  |  |  | (11,000,000) | (24,000,000)
Goodwill, Ending balance | 311,000,000 | 205,000,000 |  |  | 311,000,000 | 205,000,000
United States [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning balance |  |  |  | 220,000,000 |  | 220,000,000
Additions |  |  |  |  | 117,000,000 | 173,000,000
Impairment |  |  |  |  |  | (393,000,000)
Goodwill, Ending balance | 117,000,000 |  |  |  | 117,000,000 |
Canada (Member) |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning balance |  |  |  | 101,000,000 | 88,000,000 | 101,000,000
Additions |  |  |  |  |  | 4,000,000
Currency translation adjustments and other |  |  |  |  | 3,000,000 | (17,000,000)
Goodwill, Ending balance | 91,000,000 | 88,000,000 |  |  | 91,000,000 | 88,000,000
International [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning balance |  |  |  | $ 25,000,000 | 117,000,000 | 25,000,000
Additions |  |  |  |  |  | 99,000,000
Impairment |  |  |  |  |  | 0
Currency translation adjustments and other |  |  |  |  | (14,000,000) | (7,000,000)
Goodwill, Ending balance | $ 103,000,000 | $ 117,000,000 |  |  | $ 103,000,000 | $ 117,000,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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