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INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | $ 3 | [1] | $ 55 | [1]
Severity and duration of decline in fair value impairment |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | 0 |  | 1 |
Change in intent impairment |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | 3 |  | 54 |
Corporate Bonds |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | 3 |  | 38 |
Sovereign and Supranational |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | 0 |  | 16 |
Equity Securities |  |  |  |
Gain (Loss) on Investments [Line Items] |  |  |  |
Other-than-temporary impairment losses | $ 0 |  | $ 1 |
[1] | Includes $0 and $1 for the three-month periods ended March 31, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value and $3 and $54 for the three-month periods ended March 31, 2014 and 2013, respectively, from change in intent to sell securities

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- Definition The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563 + Details
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