Stock-based Compensation - Equity Awards (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of options exercised	$ 1,500	$ 3,000
Option, unrecognized stock-based compensation expense	10,400
Stock-based compensation expense, including cash settled	231,970	268,261
Restricted Stock Units \| Qualtrics RSU Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of RSUs that vested	176,000	529,800
Unrecognized stock-based compensation expense	$ 1,952,400
Period for recognition (in years)	2 years 4 months 24 days
Qualtrics options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)	1 year 6 months
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)	3 months 18 days
Employee Stock \| Qualtrics Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, including cash settled	$ 4,500	$ 5,100
Employee Stock \| Qualtrics RSU Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option, unrecognized stock-based compensation expense	$ 4,700

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Amount of cost to be recognized for option under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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