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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Income Tax [Line Items] |  |  |
Cumulative Loss Position Period | 3 years |  |
Uncertain tax positions | $ 0 | $ 0 | $ 0
Unrecognized tax benefits, income tax penalties and interest expense | 0 |  |
Unrecognized tax benefits, income tax penalties and interest accrued | 0 |  |
Valuation Allowance | 199,000,000 | 138,000,000 | 129,000,000
Valuation allowance | 7,000,000 |  |
Foreign tax credit carryforwards | 7,000,000 | $ 7,000,000 | $ 8,000,000
Undistributed earnings | 12,000,000 |  |
Additional income taxes provided for other foreign earnings or any additional outside basis differences inherent in foreign subsidiaries | $ 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 | $ 315,000,000 |  |
Operating Loss Carryforwards with expiration date | 218,000,000 |  |
Operating Loss Carryforwards without expiration date | 97,000,000 |  |
Deferred tax benefit | 66,000,000 |  |
Valuation Allowance | $ 66,000,000 |  |
Federal [Member] | Minimum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2036 |  |
Federal [Member] | Maximum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2037 |  |
State [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards | $ 181,000,000 |  |
Deferred tax benefit | 10,000,000 |  |
Valuation allowance | $ 10,000,000 |  |
State [Member] | Minimum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2021 |  |
State [Member] | Maximum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2040 |  |
Foreign Country [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards | $ 15,000,000 |  |
Operating Loss Carryforwards with expiration date | 3,000,000 |  |
Operating Loss Carryforwards without expiration date | 12,000,000 |  |
Valuation allowance | $ 3,000,000 |  |
Foreign Country [Member] | Minimum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2021 |  |
Foreign Country [Member] | Maximum [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Operating loss carryforwards expiration year | 2040 |  |
U.S. [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Change in valuation allowance | $ 58,000,000 |  |
Other Foreign Jurisdictions [Member] |  |  |
Schedule Of Income Tax [Line Items] |  |  |
Change in valuation allowance | $ 3,000,000 |  |

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