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Other Intangible Assets, net and Goodwill - Goodwill Narrative (Details) $ in Thousands		12 Months Ended
	Nov. 06, 2020 USD ($)	Dec. 31, 2021 USD ($) reporting_unit	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 22, 2021 USD ($)	Dec. 01, 2021 USD ($)	Aug. 03, 2021 USD ($)	Nov. 23, 2020 USD ($)	Oct. 26, 2020 USD ($)	Oct. 01, 2020 USD ($)	Feb. 28, 2020 USD ($)	Jan. 01, 2020 USD ($)
Goodwill [Line Items]
Accumulated impairment loss		$ 0	$ 0	$ 0
Number of reporting units \| reporting_unit		5
Goodwill		$ 7,904,863	6,042,964	1,328,045
Patient Connect
Goodwill [Line Items]
Goodwill					$ 8,502
ProQuest
Goodwill [Line Items]
Goodwill						$ 1,897,184
BioInfogate
Goodwill [Line Items]
Goodwill							$ 13,078
Hanlim IPS
Goodwill [Line Items]
Goodwill								$ (2,861)
IncoPat
Goodwill [Line Items]
Goodwill									$ (40,610)
CPA Global
Goodwill [Line Items]
Goodwill										$ 3,986,246
Decision Resources Group
Goodwill [Line Items]
Goodwill											$ 499,199
DRG
Goodwill [Line Items]
Goodwill											$ (499,199)
Discontinued Operations, Disposed of by Sale \| Brand Protection, AntiPiracy, and AntiFraud Solutions
Goodwill [Line Items]
Purchase price												$ 3,751
Impairment charges				$ 18,431
Goodwill written off			$ 9,129
Discontinued Operations, Disposed of by Sale \| Techstreet Business
Goodwill [Line Items]
Purchase price	$ 42,832
Goodwill written off	$ 9,129