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Employee Stock-based Compensation Plans - Composition of Teradata Restricted Stock Grants (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares) | shares	3,457
Weighted-average grant date fair value of restricted share unit grants (in usd per share) | $ / shares	$ 36.33
Service-based restricted share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares) | shares	2,758
Weighted-average grant date fair value of restricted share unit grants (in usd per share) | $ / shares	$ 37.22
Performance-based restricted share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares) | shares	699
Weighted-average grant date fair value of restricted share unit grants (in usd per share) | $ / shares	$ 32.85

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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