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Commitments and Contingencies - Contingencies (Details) - USD ($) shares in Millions, $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 01, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2022	Jan. 31, 2021	Oct. 01, 2020	Feb. 28, 2020
Commitments and Contingencies
Reserve for probable claims					$ 55.0
Decision Resources Group
Commitments and Contingencies
Additional payments to acquire business								$ 58.9
Newly issued ordinary shares (in shares)		2.9	2.9
Newly issued ordinary shares, value			$ 61.6
CPA Global
Commitments and Contingencies
Additional payments to acquire business							$ 46.5
Newly issued ordinary shares (in shares)				1.5
Newly issued ordinary shares, value						$ 43.9
ProQuest
Commitments and Contingencies
Newly issued ordinary shares (in shares)	46.9
Total consideration	$ 5,054.8
Clarivate stock to be issued	$ 1,094.9