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Warranty - Schedule of Company's Warranty Accruals (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Product Warranty Liability [Line Items] |  |
Acquisition balance relates to a pre-acquisition settlement agreement |  | $ 174
Pre-acquisition Settlement Agreement for Specific Performance [Member] |  |
Product Warranty Liability [Line Items] |  |
Acquisition balance relates to a pre-acquisition settlement agreement | $ 127 | $ 127

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- Definition Amount of increase in the standard and extended product warranty accrual from a business acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |