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Income Taxes - Additional information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes |  |  |  |  |
Discrete income tax expense | $ 4 |  |  |  |
Tax from equity compensation |  |  | $ 3 |  |
Income tax expense from GILTI |  |  | 3 |  |
Income tax expense (benefit) |  |  | 7 | $ (3) | $ 125
Loss before income taxes |  |  | $ 13 | $ (27) | $ (58)
Effective income tax rate |  |  | 53.80% | 11.10% | (215.50%)
Tax Cuts and Jobs Act, change in tax rate, income tax expense (benefit) |  | $ 126 |  | $ (6) |
Tax expense, issuance of new US Treasury regulations |  |  | $ 3 | 1 |
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional liability |  | 145 | 1 |  | $ 145
Cumulative foreign earnings |  | 1,300 |  |  |
Tax Cuts and Jobs Act of 2017, deferred tax asset, existing income tax expense (benefit) |  | 19 |  |  |
Net operating loss and tax credit carryforwards |  |  | 80 |  |
Valuation allowance |  |  | 41 |  |
Tax credit carryforward, FIN 48 reserve |  |  | 15 |  |
Tax liability related to uncertain tax positions |  | $ 28 | 37 | 34 | $ 28
Uncertain tax positions |  |  | 19 | $ 17 |
Uncertain tax positions related to business acquisitions not recognized on balance sheet |  |  | 18 |  |
Uncertain tax positions recognized as current liability on balance sheet |  |  | 37 |  |
Interest accruals related to uncertain tax liabilities |  |  | 2 |  |
United States And Certain Foreign Jurisdictions |  |  |  |  |
Income Taxes |  |  |  |  |
Net operating loss carryforwards in the United States and certain foreign jurisdictions |  |  | 11 |  |
Domestic Tax Authority |  |  |  |  |
Income Taxes |  |  |  |  |
Net operating loss carryforwards in the United States and certain foreign jurisdictions |  |  | 3 |  |
Research Tax Credit Carryforward | Domestic Tax Authority |  |  |  |  |
Income Taxes |  |  |  |  |
Research and development tax credit carryforwards |  |  | 10 |  |
Research Tax Credit Carryforward | State and Local Jurisdiction |  |  |  |  |
Income Taxes |  |  |  |  |
Research and development tax credit carryforwards |  |  | $ 56 |  |

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