Non-Interest Revenue and Expense Detail (Details 2) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Details Of Certain Statements Of Income Lines Details [Abstract]
Professional services	$ 628	$ 655	$ 1,232	$ 1,279
Occupancy and equipment	438	415	903	849
Card and merchant-related fraud losses	80	85	163	183
Communications	57	83	115	282
Gain on sale of held for sale (HFS) portfolio	1,091	0	1,218	0
Other	358	297	695	450
Total other, net	$ 470	$ 1,535	$ 1,890	$ 2,934

This represents expenses incurred with respect to card-related fraud losses

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Details of Certain Statements of Income Lines Details.

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No definition available.

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- Definition

Represents other, net expenses from miscellaneous items within other revenues not previously classified.

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No definition available.

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- Definition

The aggregate amount of professional services fees and other processing expenses.

+ References

No definition available.

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- Definition

The amount of expense in the period for communications and data processing expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense.

+ 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(b))
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
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Other noninterest expenses that are not separately presented in any other noninterest expense category.

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- Definition

The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Section 55
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-URI http://asc.fasb.org/extlink&oid=34726456&loc=d3e60097-112785

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