Acquisitions - Schedule of Business Combination, Financial Information on Transaction (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Business Acquisition [Line Items]
Cash payments, net of cash acquired	$ 13.3	$ 0.0
Goodwill	3,663.8		$ 3,720.1
Itiviti
Business Acquisition [Line Items]
Cash payments, net of cash acquired	2,580.4
Deferred payments, net	0.0
Contingent consideration liability	0.0
Aggregate purchase price	2,580.4
Net tangible assets acquired / (liabilities assumed)	(246.5)
Goodwill	1,945.7
Intangible assets	881.3
Advisor-Stream
Business Acquisition [Line Items]
Cash payments, net of cash acquired	23.2
Deferred payments, net	2.9
Contingent consideration liability	8.5
Aggregate purchase price	34.5
Net tangible assets acquired / (liabilities assumed)	(3.3)
Goodwill	27.3
Intangible assets	10.5
Total
Business Acquisition [Line Items]
Cash payments, net of cash acquired	2,603.6
Deferred payments, net	2.9
Contingent consideration liability	8.5
Aggregate purchase price	2,615.0
Net tangible assets acquired / (liabilities assumed)	(249.8)
Goodwill	1,973.0
Intangible assets	$ 891.8