Goodwill and Intangible Assets - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Bank Servicing Fees	$ 54	$ 38
Mortgage Servicing Rights, Fair Value [Member]
Bank Servicing Fees	79	76
Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding	135,200		136,700
Principal Amount Outstanding of Loans Serviced For Third Parties	105,700		106,800
Loan Principal Amount Outstanding Underlying Mortgage Servicing Rights Sold	$ 289	$ 324

Loan Principal Amount Outstanding Underlying Mortgage Servicing Rights Sold

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- Definition

Principal Amount Outstanding of Loans Serviced for Third Parties

+ References

No definition available.

+ Details

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- Definition

The total principal outstanding of financial assets transferred in a securitization, asset-backed financing arrangement, or similar transfer that has been accounted for as sales and in which the transferor continues to have involvement, including both the derecognized and recognized portion of such transferred assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719

+ Details

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- Definition

Amount of revenue from servicing real estate mortgages, credit cards, and other financial assets held by others. Includes premiums received in lieu of regular servicing fees.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 13

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13 (d))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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