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Other Intangible Assets, net and Goodwill - Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
	Nov. 06, 2020	Sep. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning Balance		$ 6,252,636	$ 1,328,045
Acquisition		31,926	4,700,138
Impact of foreign currency fluctuations and other		(85,861)	233,582
Goodwill, Ending Balance		6,198,701	6,252,636
CPA Global
Goodwill [Line Items]
Decrease to goodwill, purchase accounting adjustments		20,493
IncoPat
Goodwill [Line Items]
Decrease to goodwill, purchase accounting adjustments		136
Discontinued Operations, Disposed of by Sale | Brand Protection, AntiPiracy, and AntiFraud Solutions
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit			(9,129)
Discontinued Operations, Disposed of by Sale | Techstreet Business
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit	$ (9,129)
Science Segment
Goodwill [Line Items]
Goodwill, Beginning Balance		1,407,807	909,937
Acquisition		11,297	497,263
Goodwill, Written off Related to Sale of Business Unit			0
Impact of foreign currency fluctuations and other		(702)	607
Goodwill, Ending Balance		1,418,402	1,407,807
Intellectual Property Segment
Goodwill [Line Items]
Goodwill, Beginning Balance		4,844,829	418,108
Acquisition		20,629	4,202,875
Goodwill, Written off Related to Sale of Business Unit			(9,129)
Impact of foreign currency fluctuations and other		(85,159)	232,975
Goodwill, Ending Balance		$ 4,780,299	$ 4,844,829

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