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Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Schedule of Intangible Assets
Intangible assets consisted of the following:
 
March 31, 2013
 
December 31, 2012
 
(in millions)
Mortgage servicing rights
$
202

 
$
179

Purchased credit card relationships
58

 
60

Other
7

 
8

Total other intangible assets
$
267

 
$
247

Fair Value of Residential MSRs
Fair value of residential MSRs is calculated using the following critical assumptions:

March 31, 2013
 
December 31, 2012
Annualized constant prepayment rate (“CPR”)
18.2
%
 
22.4
%
Constant discount rate
12.5
%
 
11.3
%
Weighted average life
3.8

 
3.4

Residential MSRs Activity
Residential MSRs activity is summarized in the following table:
Three Months Ended March 31,
2013
 
2012
 
(in millions)
Fair value of MSRs:
 
 
 
Beginning balance
$
168

 
$
220

Additions related to loan sales
6

 
8

Changes in fair value due to:
 
 
 
Change in valuation inputs or assumptions used in the valuation models
26

 
16

Realization of cash flows
(10
)
 
(16
)
Ending balance
$
190

 
$
228

Residential Mortgage Loans Serviced for Others
Information regarding residential mortgage loans serviced for others, which are not included in the consolidated balance sheet, is summarized in the following table:

March 31, 2013
 
December 31, 2012
 
(in millions)
Outstanding principal balances at period end
$
31,039

 
$
32,041

Custodial balances maintained and included in noninterest bearing deposits at period end
$
722

 
$
810