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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Schedule Of Income Tax [Line Items] |  |  |  |
U.S. federal corporate tax rate |  | 35.00% |  |
Charge relating to change in U.S. federal corporate tax rate |  | $ 69,000,000 |  |
Change in valuation allowance |  | (69,000,000) |  |
Charge relating to one-time transition tax on unremitted foreign earnings |  | 33,000,000 |  |
Unrecognized tax benefits |  | 0 | $ 1,000,000 | $ 1,000,000
Unrecognized tax benefits, income tax penalties and interest expense |  | 0 |  |
Unrecognized tax benefits, income tax penalties and interest accrued |  | 0 |  |
Valuation Allowance |  | 157,000,000 | 202,000,000 | 129,000,000
Valuation allowance |  | 29,000,000 |  |
Foreign tax credit carryforwards |  | 29,000,000 | $ 5,000,000 | $ 3,000,000
Foreign tax credit carryforwards, recognized as one-time transition tax due to Tax cuts and jobs act of 2017 |  | 23,000,000 |  |
Undistributed earnings |  | 153,000,000 |  |
Income taxes provided for additional outside basis difference inherent in entities as result of reinvestment |  | 0 |  |
Foreign Subsidiaries [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Additional provision for U.S. federal income tax |  | 0 |  |
Additional provision for state income tax |  | $ 0 |  |
Minimum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Foreign tax credits expiration year |  | 2024 |  |
Maximum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Foreign tax credits expiration year |  | 2027 |  |
Federal [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards |  | $ 188,000,000 |  |
Deferred tax benefit |  | 39,000,000 |  |
Valuation Allowance |  | $ 39,000,000 |  |
Federal [Member] | Minimum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2035 |  |
Federal [Member] | Maximum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2036 |  |
State [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards |  | $ 143,000,000 |  |
Deferred tax benefit |  | 8,000,000 |  |
Valuation allowance |  | $ 8,000,000 |  |
State [Member] | Minimum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2020 |  |
State [Member] | Maximum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2037 |  |
Foreign Country [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards |  | $ 20,000,000 |  |
Valuation allowance |  | 5,000,000 |  |
Operating Loss Carryforwards without expiration date |  | 13,000,000 |  |
Operating Loss Carryforwards with expiration date |  | $ 7,000,000 |  |
Foreign Country [Member] | Minimum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2020 |  |
Foreign Country [Member] | Maximum [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Operating loss carryforwards expiration year |  | 2037 |  |
United States [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Change in valuation allowance |  | $ 44,000,000 |  |
Canada (Member) |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Change in valuation allowance |  | 3,000,000 |  |
Other Foreign Jurisdictions [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
Change in valuation allowance |  | $ (2,000,000) |  |
Scenario Forecast [Member] |  |  |  |
Schedule Of Income Tax [Line Items] |  |  |  |
U.S. federal corporate tax rate | 21.00% |  |  |

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