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Goodwill and Mortgage Servicing Rights (Tables)
 6 Months Ended
Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Mortgage Servicing Rights
Table 57: Mortgage Servicing Rights
 
Commercial MSRs
 
Residential MSRs
 
In millions
2020

2019

 
2020

2019

 
January 1
$
649

$
726

 
$
995

$
1,257

 
Additions:
 
 
 
 
 
 
From loans sold with servicing retained
45

16

 
22

14

 
Purchases
23

51

 
61

65

 
Changes in fair value due to:
 
 
 
 
 
 
Time and payoffs (a)
(61
)
(75
)
 
(82
)
(77
)
 
Other (b)
(166
)
(88
)
 
(419
)
(262
)
 
June 30
$
490

$
630

 
$
577

$
997

 
Related unpaid principal balance at June 30
$
228,985

$
193,510

 
$
122,043

$
124,461

 
Servicing advances at June 30
$
285

$
204

 
$
92

$
128

 
(a)
Represents decrease in MSR value due to passage of time, including the impact from both regularly scheduled loan principal payments and loans that were paid down or paid off during the period.
(b)
Represents MSR value changes resulting primarily from market-driven changes in interest rates.
Commercial Mortgage Loan Servicing Assets - Key Valuation Assumptions
Table 58: Commercial Mortgage Servicing Rights – Key Valuation Assumptions
Dollars in millions
June 30
2020

 
December 31
2019

 
Fair value
$
490

 
$
649

 
Weighted-average life (years)
4.3

 
4.1

 
Weighted-average constant prepayment rate
4.84
%
 
4.56
%
 
Decline in fair value from 10% adverse change
$
8

 
$
9

 
Decline in fair value from 20% adverse change
$
16

 
$
17

 
Effective discount rate
7.42
%
 
7.91
%
 
Decline in fair value from 10% adverse change
$
13

 
$
17

 
Decline in fair value from 20% adverse change
$
26

 
$
34

 
Residential Mortgage Loan Servicing Assets - Key Valuation Assumptions
Table 59: Residential Mortgage Servicing Rights – Key Valuation Assumptions
Dollars in millions
June 30
2020

 
December 31
2019

 
Fair value
$
577

 
$
995

 
Weighted-average life (years)
2.9

 
5.2

 
Weighted-average constant prepayment rate
27.56
%
 
13.51
%
 
Decline in fair value from 10% adverse change
$
41

 
$
46

 
Decline in fair value from 20% adverse change
$
79

 
$
89

 
Weighted-average option adjusted spread
912

bps
769

bps
Decline in fair value from 10% adverse change
$
14

 
$
27

 
Decline in fair value from 20% adverse change
$
27

 
$
52