Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Investment Servicing [Member]	Dec. 31, 2010 Investment Servicing [Member]	Dec. 31, 2011 Investment Management [Member]	Dec. 31, 2009 Investment Management [Member]
Goodwill [Line Items]
Beginning balance	$ 5,597	$ 4,550	$ 5,591	$ 4,544	$ 6	$ 6
Acquisitions	100	1,005	68	1,005	32
Foreign currency translation, net	(52)	42	(49)	42	(3)
Ending balance	$ 5,645	$ 5,597	$ 5,610	$ 5,591	$ 35	$ 6

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

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-Publisher FASB

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