Business Combinations - Purchase Price Composition (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Dec. 01, 2021	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021	Nov. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Share price (in dollars per share)					$ 23.34
Restricted cash		$ 16.9	$ 15.5	$ 156.7		$ 14.7
ProQuest
Business Acquisition [Line Items]
Newly issued ordinary shares (in shares)	46.9
Issuance of shares	$ 1,094.9
Cash consideration	3,951.9
Total purchase price	5,046.8
Cash acquired	52.5
Total purchase price, net of cash acquired	4,994.3
Base cash consideration	3,988.0
Working capital adjustments	31.7
Closing indebtedness adjustments	36.6
Closing cash consideration	32.2
Restricted cash	$ 2.0
CPA Global
Business Acquisition [Line Items]
Newly issued ordinary shares (in shares)		1.5