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INVESTMENTS - Details of Holdings of Perpetual Securities (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Investment Holdings [Line Items] |  |
Amortized Cost | $ 49,680 | $ 52,275
Fair Value | 51,899 | 54,036
Perpetual Securities |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 5,522 | 6,897
Fair Value | 5,352 | 6,439
Unrealized Gain (Loss) | (170) | (458)
Perpetual Securities | Upper Tier II |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 3,251 | 4,285
Fair Value | 3,194 | 4,244
Unrealized Gain (Loss) | (57) | (41)
Perpetual Securities | Upper Tier II | AA |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 80 | 196
Fair Value | 81 | 204
Unrealized Gain (Loss) | 1 | 8
Perpetual Securities | Upper Tier II | A |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 530 | 2,108
Fair Value | 544 | 2,046
Unrealized Gain (Loss) | 14 | (62)
Perpetual Securities | Upper Tier II | BBB |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 2,641 | 1,791
Fair Value | 2,569 | 1,804
Unrealized Gain (Loss) | (72) | 13
Perpetual Securities | Upper Tier II | BB or Lower |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 0 | 190
Fair Value | 0 | 190
Unrealized Gain (Loss) | 0 | 0
Perpetual Securities | Tier I |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 1,945 | 2,268
Fair Value | 1,807 | 1,834
Unrealized Gain (Loss) | (138) | (434)
Perpetual Securities | Tier I | A |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 60 | 0
Fair Value | 60 | 0
Unrealized Gain (Loss) | 0 | 0
Perpetual Securities | Tier I | BBB |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 1,350 | 1,684
Fair Value | 1,238 | 1,417
Unrealized Gain (Loss) | (112) | (267)
Perpetual Securities | Tier I | BB or Lower |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 535 | 584
Fair Value | 509 | 417
Unrealized Gain (Loss) | (26) | (167)
Perpetual Securities | Other subordinated - non-banks | BBB |  |
Investment Holdings [Line Items] |  |
Amortized Cost | 326 | 344
Fair Value | 351 | 361
Unrealized Gain (Loss) | $ 25 | $ 17

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- Definition For an unclassified balance sheet, this item represents investments in debt and equity securities which are categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15E -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15D -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15C -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (d) -SubTopic 10 -Topic 320 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 + Details
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