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Details of Certain Consolidated Statements of Income Lines (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense | $ 2,761 | $ 2,301 | $ 2,131
Fair Value Change Forward Exchange Contract [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense |  |  | 45
Cumulative Translation Adjustment Benefit [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense |  |  | 135
Certain Account Reconciliations [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense |  |  | 59
Occupancy and equipment [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense | 1,685 | 1,562 | 1,619
Communications [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense | 378 | 383 | 414
Mastercard and Visa settlements [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense | (562) | (852) | (852)
Other net expenses [Member] |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |
Total other, net expense | $ 1,260 | $ 1,208 | $ 950

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- Details
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Namespace Prefix: | us-gaap_
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- Definition Other noninterest expenses that are not separately presented in any other noninterest expense category. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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Balance Type: | debit
Period Type: | duration