Credit Card and Student Loan Securitization Activities (Tables)
3 Months Ended
Mar. 31, 2015
Variable Interest Entities Disclosure [Abstract]  
Schedule of Restricted Credit Card Securitized Assets [Text Block]
The carrying values of these restricted assets, which are presented on the Company’s condensed consolidated statements of financial condition as relating to securitization activities, are shown in the table below (dollars in millions):
 
March 31,
2015
 
December 31,
2014
Restricted cash
$
16

 
$
16

Investors’ interests held by third-party investors
15,900

 
15,950

Investors’ interests held by wholly-owned subsidiaries of Discover Bank
5,782

 
5,789

Seller’s interest
6,650

 
8,596

Loan receivables(1)
28,332

 
30,335

Allowance for loan losses allocated to securitized loan receivables(1)
(798
)
 
(805
)
Net loan receivables
27,534

 
29,530

Other
37

 
37

Carrying value of assets of consolidated variable interest entities
$
27,587

 
$
29,583

 
 
 
 

(1)
The Company maintains its allowance for loan losses at an amount sufficient to absorb probable losses inherent in all loan receivables, which includes all loan receivables in the trusts. Therefore, credit risk associated with the transferred receivables is fully reflected on the Company’s balance sheet in accordance with GAAP.
Schedule of Investors' Interests and Related Excess Spreads
The table below provides information concerning investors’ interests and related excess spread (dollars in millions):  
At March 31, 2015
Investors’
Interests(1)
 
# of Series
Outstanding
 
3-Month Rolling
Average Excess
Spread
Discover Card Execution Note Trust (DiscoverSeries notes)
$
21,682

 
39

 
13.31
%
 
 
 
 
 
 

(1)
Investors’ interests include third-party interests and subordinated interests held by wholly-owned subsidiaries of Discover Bank.
Schedule of Restricted Student Loan Securitized Assets [Text Block]
The carrying values of these restricted assets, which are presented on the Company’s condensed consolidated statements of financial condition as relating to securitization activities, are shown in the table below (dollars in millions): 
 
March 31,
2015
 
December 31,
2014
Restricted cash
$
88

 
$
86

 
 
 
 
Student loan receivables(1)
1,894

 
1,969

Allowance for loan losses allocated to securitized loan receivables(1)
(28
)
 
(28
)
Net student loan receivables
1,866

 
1,941

Carrying value of assets of consolidated variable interest entities
$
1,954

 
$
2,027

 
 
 
 

(1)
The Company maintains its allowance for loan losses on PCI loans sufficient to absorb probable decreases in cash flows that were previously expected. Therefore, credit risk associated with the transferred receivables is fully reflected on the Company's balance sheet in accordance with GAAP.