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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
(Dollars in millions)
Consumer Banking and Private Wealth Management
 
Wholesale Banking
 
Total
Balance, January 1, 2014

$4,262

 

$2,107

 

$6,369

Acquisition of Lantana Oil and Gas Partners, Inc.
—

 
8

 
8

Sale of RidgeWorth
—

 
(40
)
 
(40
)
Balance, December 31, 2014

$4,262

 

$2,075

 

$6,337
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]
(Dollars in millions)
 MSRs -
Fair Value
 
Other
 
Total
Balance, January 1, 2015

$1,206

 

$13

 

$1,219

Amortization 1
—

 
(8
)
 
(8
)
Servicing rights originated
238

 
13

 
251

Servicing rights purchased
109

 
—

 
109

Changes in fair value:
 
 
 
 

Due to changes in inputs and assumptions 2
(32
)
 
—

 
(32
)
Other changes in fair value 3
(210
)
 
—

 
(210
)
Servicing rights sold
(4
)
 
—

 
(4
)
Balance, December 31, 2015

$1,307

 

$18

 

$1,325

 
 
 
 
 
 
Balance, January 1, 2014

$1,300

 

$34

 

$1,334

Amortization 1
—

 
(12
)
 
(12
)
Servicing rights originated
178

 
—

 
178

Servicing rights purchased
130

 
—

 
130

Changes in fair value:
 
 
 
 


Due to changes in inputs and assumptions 2
(234
)
 
—

 
(234
)
Other changes in fair value 3
(167
)
 
—

 
(167
)
Servicing rights sold
(1
)
 
—

 
(1
)
Sale of RidgeWorth
—

 
(9
)
 
(9
)
Balance, December 31, 2014

$1,206

 

$13

 

$1,219

1 Does not include expense associated with non-qualified community development investments. See Note 10, "Certain Transfers of Financial Assets and Variable Interest Entities," for additional information.
2 Primarily reflects changes in option adjusted spreads and prepayment speed assumptions, due to changes in interest rates.
3 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)
December 31, 2015
 
December 31, 2014
Fair value of MSRs

$1,307

 

$1,206

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

$49

 

$46

Decline in fair value from 20% adverse change
94

 
88

Option adjusted spread (annual)
8
%
 
10
%
Decline in fair value from 10% adverse change

$64

 

$55

Decline in fair value from 20% adverse change
123

 
105

Weighted-average life (in years)
6.6

 
6.4

Weighted-average coupon
4.1
%
 
4.2
%