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Income Taxes (Components Of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax liabilities [Abstract] |  |
Unearned premium reserve | $ 59 | $ 75
Deferral of cancellation of indebtedness income | 0 | 14
Deferred acquisition costs | 16 | 21
Net unrealized gains in accumulated other comprehensive income | 0 | 0
Partnership basis difference | 3 | 11
Basis difference in foreign subsidiaries | 0 | 1
Net deferred taxes on VIEs | 55 | 38
Other | 0 | 0
Total gross deferred tax liabilities | 133 | 160
Deferred tax assets [Abstract] |  |
Compensation and employee benefits | 7 | 11
Accrued interest | 158 | 131
Loss and loss adjustment expense reserves | 135 | 87
Net operating loss | 512 | 582
Foreign tax credit | 62 | 62
Capital loss carryforward and other-than-temporary impairments | 22 | 22
Net unrealized losses on insured derivatives | 8 | 14
Net losses on financial instruments at fair value and foreign exchange | 30 | 13
Net unrealized losses in accumulated other comprehensive income | 32 | 5
Alternative minimum tax credit carryforward | 0 | 0
Other | 1 | 3
Total gross deferred tax assets | 967 | 930
Valuation allowance | 834 | 770
Net deferred tax asset | $ 0 | $ 0

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- Definition Amount before allocation of valuation allowances of deferred tax liability attributable to deductible temporary differences from the unearned premiums reserve. + References No definition available. + Details
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