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Income Taxes (Income Taxes and Shareholders' Equity) (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Current taxes: |  |  |
Federal | $ 0 | $ 3 | $ (1)
State | 8 | 2 | 1
Foreign | 1 | (6) | 15
Deferred taxes: |  |  |
Federal | 165 | 350 | (919)
Foreign | (8) | 15 | (16)
Provision (benefit) for income taxes | 166 | 364 | (920)
Income tax effects allocated directly to equity [Abstract] |  |  |
Change in unrealized gains and losses on investments | (81) | 86 | 116
Change in other-than-temporary impairment losses | 4 | 42 | 9
Change in foreign currency translation | 1 | (2) | (1)
Share-based compensation | 4 | 7 | 4
Total income taxes charged (credited) to shareholders' equity | (72) | 133 | 128
Total effect of income taxes | $ 94 | $ 497 | $ (792)

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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 + Details
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