Goodwill and Other Intangible Assets (Changes in Carrying Amounts of Goodwill Attributable to Each Operating Segment) (Details) (USD $) In Millions	9 Months Ended
Sep. 30, 2011
Goodwill impairment	$ 0
Goodwill, beginning balance	6,008
Contingent consideration	8
Goodwill, ending balance	6,016
Community Banking [Member]
Goodwill, beginning balance	4,519
Contingent consideration	0
Goodwill, ending balance	4,519
Residential Mortgage Banking [Member]
Goodwill, beginning balance	7
Contingent consideration	0
Goodwill, ending balance	7
Sales Finance [Member]
Goodwill, beginning balance	93
Contingent consideration	0
Goodwill, ending balance	93
Specialized Lending [Member]
Goodwill, beginning balance	104
Contingent consideration	0
Goodwill, ending balance	104
Insurance Services [Member]
Goodwill, beginning balance	1,067
Contingent consideration	8
Goodwill, ending balance	1,075
Financial Services [Member]
Goodwill, beginning balance	192
Contingent consideration	0
Goodwill, ending balance	192
All Other [Member]
Goodwill, beginning balance	26
Contingent consideration	0
Goodwill, ending balance	$ 26

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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-Name Statement of Financial Accounting Standard (FAS)

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details