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Other Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |  |  |
Rental expense | $ 28 | $ 27 | $ 28
Future minimum license fees payable | Future minimum license fees payable under existing license agreements as of December 31, 2018 are immaterial for the years ended December 31, 2019 and thereafter. |  |
Potential payments under licensing arrangements | $ 7 |  |

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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- Definition Minimum amount of commitment for license fees. + References No definition available. + Details
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- Definition The amount of additional payments that could be required for the achievement of certain milestones under a licensing agreement. + References No definition available. + Details
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