| Cover Cover | Sep. 16, 2019 |
| Cover page. | |
| Document Type | 8-K/A |
| Document Period End Date | Sep. 16, 2019 |
| Entity Registrant Name | Cognizant Technology Solutions Corporation |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-24429 |
| Entity Tax Identification Number | 13-3728359 |
| Entity Address, Address Line One | Glenpointe Centre West |
| Entity Address, Address Line Two | 500 Frank W. Burr Blvd. |
| Entity Address, City or Town | Teaneck, |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07666 |
| City Area Code | 201 |
| Local Phone Number | 801-0233 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock,$0.01 par value per share |
| Trading Symbol | CTSH |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001058290 |
| Amendment Flag | true |
| Amendment Description | This Form 8-K/A amends the Form 8-K filed by Cognizant Technology Solutions Corporation (the “Company”) on September 20, 2019 (the “Original Filing”) solely to include the Cover Page Interactive Data File. The Company has made no change to the Item 5.02 disclosure included in the Original Filing. |
