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Income Taxes (Components Of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax liabilities [Abstract] |  |
Unearned premium reserve | $ 143 | $ 159
Deferral of cancellation of indebtedness income | 46 | 68
Deferred acquisition costs | 42 | 56
Net gains on financial instruments at fair value and foreign exchange | 4 | 0
Partnership basis difference | 36 | 30
Basis difference in foreign subsidiaries | 64 | 40
Other | 23 | 86
Total gross deferred tax liabilities | 358 | 439
Deferred tax assets [Abstract] |  |
Compensation and employee benefits | 19 | 19
Accrued interest | 177 | 137
Loss and loss adjustment expense reserves | 142 | 119
Net operating loss | 929 | 963
Foreign tax credit | 7 | 9
Net unrealized losses on insured derivatives | 29 | 35
Net losses on financial instruments at fair value and foreign exchange | 0 | 45
Net unrealized losses in accumulated other comprehensive income | 6 | 15
Alternative minimum tax credit carryforward | 26 | 22
Net deferred taxes on VIEs | 0 | 14
Total gross deferred tax assets | 1,335 | 1,378
Valuation allowance | 7 | 0
Net deferred tax asset | $ 970 | $ 939

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph b(2) -Article 7 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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