|
Document and Entity Information
|
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Apr. 24, 2015
|
|
| Document Information [Line Items] | ||
| Document type | 10-Q | |
| Amendment flag | false | |
| Document period end date | Mar. 31, 2015 | |
| Document fiscal year focus | 2015 | |
| Document fiscal period focus | Q1 | |
| Entity registrant name | Discover Financial Services | |
| Entity central index key | 0001393612 | |
| Current fiscal year end date | --12-31 | |
| Entity filer category | Large Accelerated Filer | |
| Entity common stock, shares outstanding | 442,505,016 |