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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2016
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, 2016

$4,262

 

$2,075

 

$6,337

Acquisition of Pillar
—

 
—

 
—

Balance, December 31, 2016

$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, 2016

$1,307

 

$18

 

$1,325

Amortization 1
—

 
(9
)
 
(9
)
Servicing rights originated
312

 
—

 
312

Servicing rights purchased
200

 
—

 
200

Servicing rights acquired in Pillar acquisition
—

 
62

 
62

Other intangible assets acquired in Pillar acquisition 2
—

 
14

 
14

Changes in fair value:
 
 
 
 

Due to changes in inputs and assumptions 3
(13
)
 
—

 
(13
)
Other changes in fair value 4
(232
)
 
—

 
(232
)
Servicing rights sold
(2
)
 
—

 
(2
)
Balance, December 31, 2016

$1,572

 

$85

 

$1,657

 
 
 
 
 
 
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 3
(32
)
 
—

 
(32
)
Other changes in fair value 4
(210
)
 
—

 
(210
)
Servicing rights sold
(4
)
 
—

 
(4
)
Balance, December 31, 2015

$1,307

 

$18

 

$1,325

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 The majority of these other intangible assets acquired from Pillar relate to indefinite-lived agency licenses. See Note 2, "Acquisitions/Dispositions," for additional information.
3 Primarily reflects changes in option adjusted spreads and prepayment speed assumptions, due to changes in interest rates.
4 Represents changes due to the collection of expected cash flows, net of accretion due to the passage of time.
Finite-lived Intangible Assets Amortization Expense [Table Text Block]
The Company's estimated future amortization of intangible assets at December 31, 2016 is presented in the following table:
(Dollars in millions)
 
2017

$15

2018
12

2019
9

2020
9

2021
7

Thereafter
23

Total 1

$75

1 Does not include indefinite-lived intangible assets of $10 million.
Key Characteristics, Inputs, and Economic Assumptions Used to Estimate the Fair Value of the Company's MSRs
(Dollars in millions)
December 31, 2016
 
December 31, 2015
Fair value of MSRs

$1,572

 

$1,307

Prepayment rate assumption (annual)
9
%
 
10
%
Decline in fair value from 10% adverse change

$50

 

$49

Decline in fair value from 20% adverse change
97

 
94

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

$63

 

$64

Decline in fair value from 20% adverse change
122

 
123

Weighted-average life (in years)
7.0

 
6.6

Weighted-average coupon
4.0
%
 
4.1
%