Commitments, Contingencies and Guarantees (Tables)
3 Months Ended
Mar. 31, 2015
Guarantor Obligations [Line Items]  
Schedule of Lease Commitments
The Company leases various office space and equipment under capital and non-cancelable operating leases, which expire at various dates through 2028. At the end of the current period, future minimum payments on leases with original terms in excess of one year consist of the following (dollars in millions): 
 
Capitalized
Leases
 
Operating
Leases
2015
$
1

 
$
12

2016

 
16

2017

 
14

2018

 
12

2019

 
10

Thereafter

 
44

Total minimum lease payments
1

 
$
108

Less: Amount representing interest

 
 
Present value of net minimum lease payments
$
1

 
 
 
 
 
 
Schedule of Settlement Withholdings and Escrow Deposits
 The table below provides information regarding settlement withholdings and escrow deposits, which are recorded in interest-bearing deposit accounts and accrued expenses and other liabilities on the Company’s condensed consolidated statements of financial condition (dollars in millions): 
 
March 31,
2015
 
December 31,
2014
Settlement withholdings and escrow deposits
$
21

 
$
16

 
 
 
 
Counterparty Settlement Guarantees [Member]  
Guarantor Obligations [Line Items]  
Schedule of Maximum Potential Counterparty Exposures Related to Settlement Guarantees and Merchant Chargeback Guarantee
While the Company has some contractual remedies to offset these counterparty settlement exposures (such as letters of credit or pledged deposits), in the event that all licensees and/or issuers were to become unable to settle their transactions, the Company estimates its maximum potential counterparty exposures to these settlement guarantees, based on historical transaction volume, would be as follows (dollars in millions): 
 
March 31,
2015
Diners Club:
 
Merchant guarantee
$
107

PULSE:
 
ATM guarantee
$
1

 
 
Merchant Chargeback Guarantees [Member]  
Guarantor Obligations [Line Items]  
Schedule of Maximum Potential Counterparty Exposures Related to Settlement Guarantees and Merchant Chargeback Guarantee
The table below summarizes certain information regarding merchant chargeback guarantees (in millions):
 
For the Three Months Ended March 31,
 
2015
 
2014
Aggregate sales transaction volume(1)
$
29,498

 
$
28,154

 
 
 
 

(1)
Represents period transactions processed on the Discover Network for which a potential liability exists that, in aggregate, can differ from credit card sales volume.