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		$ 6,042,964	$ 1,328,045
Acquisition		31,926	4,501,894
Impact of foreign currency fluctuations and other		(75,568)	222,154
Goodwill, Ending Balance		5,999,322	6,042,964
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		1,409,743	909,937
Acquisition		11,297	499,199
Goodwill, Written off Related to Sale of Business Unit			0
Impact of foreign currency fluctuations and other		1,015	607
Goodwill, Ending Balance		1,422,055	1,409,743
Intellectual Property Segment (As Restated)
Goodwill [Line Items]
Goodwill, Beginning Balance		4,633,221	418,108
Acquisition		20,629	4,002,695
Goodwill, Written off Related to Sale of Business Unit			(9,129)
Impact of foreign currency fluctuations and other		(76,583)	221,547
Goodwill, Ending Balance		$ 4,577,267	$ 4,633,221

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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