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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill by Reportable Segment
(Dollars in millions)
 
Retail
Banking
 
Diversified
Commercial
Banking
 
CIB
 
W&IM
 
Consumer Banking and Private Wealth Management
 
Wholesale Banking
 
Total
Balance, January 1, 2012
 

$4,854

 

$928

 

$180

 

$382

 

$—

 

$—

 

$6,344

Acquisition of assets of FirstAgain, LLC
 
—

 
—

 
—

 
—

 
32

 
—

 
32

Intersegment transfers
 
(4,854
)
 
(928
)
 
(180
)
 
(382
)
 
3,930

 
2,414

 
—

Impairment of GenSpring
 
—

 
—

 
—

 
—

 
—

 
(7
)
 
(7
)
Balance, September 30, 2012
 

$—

 

$—

 

$—

 

$—

 

$3,962

 

$2,407

 

$6,369

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance, January 1, 2011
 

$4,854

 

$928

 

$180

 

$361

 

$—

 

$—

 

$6,323

Contingent consideration
 
—

 
—

 
—

 
1

 
—

 
—

 
1

Acquisition of certain additional
assets of CSI Capital Management
 
—

 
—

 
—

 
20

 
—

 
—

 
20

Balance, September 30, 2011
 

$4,854

 

$928

 

$180

 

$382

 

$—

 

$—

 

$6,344
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]
 
(Dollars in millions)
Core Deposit  
Intangibles
 
 MSRs -
Fair Value
 
Other
 
Total
Balance, January 1, 2012

$38

 

$921

 

$58

 

$1,017

Amortization
(17
)
 
—

 
(14
)
 
(31
)
MSRs originated
—

 
244

 
—

 
244

Changes in fair value:
 
 
 
 
 
 
 
Due to changes in inputs and assumptions 1
—

 
(157
)
 
—

 
(157
)
Other changes in fair value 2
—

 
(173
)
 
—

 
(173
)
Sale of MSRs
—

 
(4
)
 
—

 
(4
)
Balance, September 30, 2012

$21

 

$831

 

$44

 

$896

 
 
 
 
 
 
 
 
Balance, January 1, 2011

$67

 

$1,439

 

$65

 

$1,571

Amortization
(23
)
 
—

 
(11
)
 
(34
)
MSRs originated
—

 
183

 
—

 
183

Changes in fair value:
 
 
 
 
 
 
 
Due to changes in inputs and assumptions 1
—

 
(443
)
 
—

 
(443
)
Other changes in fair value 2
—

 
(139
)
 
—

 
(139
)
Sale of MSRs
—

 
(7
)
 
—

 
(7
)
Other
—

 
—

 
7

 
7

Balance, September 30, 2011

$44

 

$1,033

 

$61

 

$1,138

1 Primarily reflects changes in discount rates and prepayment speed assumptions, due to changes in interest rates.
2 Represents changes due to the collection of expected cash flows, net of accretion, due to the passage of time.
Key Characteristics, Inputs, and Economic Assumptions Used to Estimate the Fair Value of the Company's MSRs
(Dollars in millions)
September 30, 2012
 
December 31, 2011
Fair value of retained MSRs

$831

 

$921

Prepayment rate assumption (annual)
19
%
 
20
%
Decline in fair value from 10% adverse change

$49

 

$52

Decline in fair value from 20% adverse change
92

 
98

Discount rate (annual)
11
%
 
11
%
Decline in fair value from 10% adverse change

$31

 

$33

Decline in fair value from 20% adverse change
60

 
63

Weighted-average life (in years)
4.3

 
4.3

Weighted-average coupon
4.9
%
 
5.2
%