XML 68 R27.htm IDEA: XBRL DOCUMENT
v3.25.3

Income Taxes Income Taxes (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rates | Our effective income tax rates were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Effective income tax rate | 69.1 | % |  | 22.7 | % |  | 39.3 | % |  | 23.4 | %

X
- Definition [Table Text Block] for Schedule of Effective Income Tax Rates [Table] + References No definition available. + Details
Name: | ctsh_ScheduleofEffectiveIncomeTaxRatesTableTextBlock
Namespace Prefix: | ctsh_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration