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Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | $ (917) |  |
Change in net unrealized pension and other postretirement benefit losses | (17) | 5 | (10)
Balance as of December 31 | (876) | (917) |
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Investment securities | 149 | (272) | 749
Cash flow hedges | 3 | 11 | 29
Foreign currency translation adjustments | (40) | 22 | 33
Net investment hedges | (14) | (396) | 0
Pension and other postretirement benefit losses | (7) | 18 | (28)
Total tax impact | 91 | (617) | 783
Error Correction Prior Period Adjustments [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Net translation of investments in foreign operations | 190 |  |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | (917) | (712) | (1,606)
Impact of the Adoption of new GAAP |  | (315) |
Net unrealized gains (losses) | 243 | (141) | 1,329
Reclassification for realized (gains) losses into earnings | (6) | 25 | (71)
Net translation of investments in foreign operations | (153) | 189 | 523
Net gains (losses) related to hedges of investment in foreign operations | (26) | 32 | (877)
Change in net unrealized pension and other postretirement benefit losses | (17) | 5 | (10)
Net change in accumulated other comprehensive (loss) income | 41 | (205) | 894
Balance as of December 31 | (876) | (917) | (712)
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | 57 | 507 | (699)
Impact of the Adoption of new GAAP |  | (315) |
Net unrealized gains (losses) | 245 | (139) | 1,351
Reclassification for realized (gains) losses into earnings | (14) | 4 | (145)
Net change in accumulated other comprehensive (loss) income | 231 | (450) | 1,206
Balance as of December 31 | 288 | 57 | 507
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | (7) | (28) | (80)
Net unrealized gains (losses) | (2) | (2) | (22)
Reclassification for realized (gains) losses into earnings | 8 | 23 | 74
Net change in accumulated other comprehensive (loss) income | 6 | 21 | 52
Balance as of December 31 | (1) | (7) | (28)
Accumulated Translation Adjustment [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | (503) | (722) | (368)
Reclassification for realized (gains) losses into earnings |  | (2) |
Net translation of investments in foreign operations | (153) | 189 | 523
Net gains (losses) related to hedges of investment in foreign operations | (26) | 32 | (877)
Net change in accumulated other comprehensive (loss) income | (179) | 219 | (354)
Balance as of December 31 | (682) | (503) | (722)
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |
Changes in Other Comprehensive income |  |  |
Balance as of December 31 | (464) | (469) | (459)
Change in net unrealized pension and other postretirement benefit losses | (17) | 5 | (10)
Net change in accumulated other comprehensive (loss) income | (17) | 5 | (10)
Balance as of December 31 | $ (481) | $ (464) | $ (469)

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 26 -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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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 Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580 + Details
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- Definition Tax effect of the gross appreciation or the gross loss, net of reclassification adjustment, in the value of the total unsold available-for-sale securities at the end of an accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 25 -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 Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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. + Details
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- Definition The after tax effect on other comprehensive income of a change in accounting principle recognized in the period, which occurred before retrospective adjustments were required, or is in lieu of retrospective adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 154 -Paragraph 9, 17 -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 Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2)-(3) -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794 + Details
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- Definition The increase (decrease) in accumulated comprehensive income during the period related to pension and other postretirement benefit plans, after tax. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph c -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 130 -Paragraph 14, 17, 22, 26 -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 AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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. + Details
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- Definition Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 25 -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 Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e640-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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. + Details
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