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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Identifiable Intangible Assets Subject to Amortization
The following table, which excludes fully amortized intangibles, presents information for identifiable intangible assets:
 
 
June 30, 2019
 
December 31, 2018
(Dollars in millions)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
CDI
 
$
605

 
$
(482
)
 
$
123

 
$
605

 
$
(460
)
 
$
145

Other, primarily customer relationship intangibles
 
1,331

 
(742
)
 
589

 
1,329

 
(716
)
 
613

Total
 
$
1,936

 
$
(1,224
)
 
$
712

 
$
1,934

 
$
(1,176
)
 
$
758