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Details of Certain Consolidated Statements of Income Lines (Details 3) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total other, net expense | $ 1,534 | $ 1,674 | $ 3,064 | $ 3,149
Professional services [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total other, net expense | 763 | 711 | 1,479 | 1,402
Occupancy and equipment [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total other, net expense | 460 | 446 | 932 | 884
Communications [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total other, net expense | 92 | 95 | 188 | 191
Other net expenses [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total other, net expense | $ 219 | $ 422 | $ 465 | $ 672

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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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