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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 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, December 31, 2012

$—

 

$—

 

$—

 

$—

 

$3,955

 

$2,414

 

$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, December 31, 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
(21
)
 
—

 
(18
)
 
(39
)
MSRs originated
—

 
336

 
—

 
336

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

 
(112
)
 
—

 
(112
)
Other changes in fair value 2
—

 
(241
)
 
—

 
(241
)
Sale of MSRs
—

 
(5
)
 
—

 
(5
)
Balance, December 31, 2012

$17

 

$899

 

$40

 

$956

 
 
 
 
 
 
 
 
Balance, January 1, 2011

$67

 

$1,439

 

$65

 

$1,571

Amortization
(29
)
 
—

 
(14
)
 
(43
)
MSRs originated
—

 
224

 
—

 
224

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

 
(533
)
 
—

 
(533
)
Other changes in fair value 2
—

 
(200
)
 
—

 
(200
)
Sale of MSRs
—

 
(9
)
 
—

 
(9
)
Other
—

 
—

 
7

 
7

Balance, December 31, 2011

$38

 

$921

 

$58

 

$1,017

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.
Schedule of Expected Amortization Expense [Table Text Block]
(Dollars in millions)
Core Deposit
Intangibles
 
Other
 
Total
2013

$13

 

$10

 

$23

2014
4

 
8

 
12

2015
—

 
7

 
7

2016
—

 
4

 
4

2017
—

 
4

 
4

Thereafter
—

 
7

 
7

Total

$17

 

$40

 

$57
Key Characteristics, Inputs, and Economic Assumptions Used to Estimate the Fair Value of the Company's MSRs
(Dollars in millions)
December 31, 2012
 
December 31, 2011
Fair value of retained MSRs

$899

 

$921

Prepayment rate assumption (annual)
16
%
 
20
%
Decline in fair value from 10% adverse change

$50

 

$52

Decline in fair value from 20% adverse change
95

 
98

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

$37

 

$33

Decline in fair value from 20% adverse change
70

 
63

Weighted-average life (in years)
4.9

 
4.3

Weighted-average coupon
4.8
%
 
5.2
%