Derivative Instruments and Other Financial Instruments Used For Hedging (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Dec. 31, 2013
Cash flow hedges
Derivative Notional Amount	$ 67,889	$ 64,438
Income from accumulated other comprehensive income expected to be reclassified to net interest income	98
Cash Flow Hedges \| Weighted average
Cash flow hedges
Weighted average remaining life of the currently active cash flow hedges	3 years 11 months 23 days
Cash Flow Hedges \| LIBOR indexed loans \| Interest rate swaps
Cash flow hedges
Derivative Notional Amount	$ 7,000

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

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- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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