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Acquisitions - Summary of Purchase Price Allocation (Parenthetical) (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2017 USD ($)
Business Acquisition [Line Items] |
Goodwill | $ 116
Trade Names [Member] |
Business Acquisition [Line Items] |
Estimated useful lives | 20 years
Customer Relationships [Member] |
Business Acquisition [Line Items] |
Estimated useful lives | 10 years

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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