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Leases - Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash Paid for amounts included in measurement of lease liabilities
Noncash Impairment, Leases	$ 757	$ 110	$ 60,232	$ 4,880

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- Definition

Cash Flow, Lessee [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	clvt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Noncash Impairment, Leases

+ References

No definition available.

+ Details

Name:	clvt_NoncashImpairmentLeases
Namespace Prefix:	clvt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration