Acquisitions - Financial Information on Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2021
Business Acquisition [Line Items]
Cash payments, net of cash acquired	$ 13.3	$ 2,603.6	$ 339.1
Goodwill	$ 3,484.9	3,720.1
Fiscal Year 2021 Acquisitions
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)		(256.2)
Goodwill		1,956.0
Intangible assets		915.1
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)		(252.9)
Goodwill		1,928.7		$ 1,928.7
Intangible assets		904.6		$ 904.6
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
Fiscal Year 2020 Acquisitions
Business Acquisition [Line Items]
Cash payments, net of cash acquired			298.0
Deferred payments, net			10.4
Contingent consideration liability			7.0
Aggregate purchase price			315.4
Net tangible assets acquired / (liabilities assumed)			(13.1)
Goodwill			198.9
Intangible assets			129.6
Shadow Financial
Business Acquisition [Line Items]
Cash payments, net of cash acquired			35.6
Deferred payments, net			3.0
Contingent consideration liability			0.0
Aggregate purchase price			38.6
Net tangible assets acquired / (liabilities assumed)			(0.1)
Goodwill			17.6
Intangible assets			21.1
Fi360
Business Acquisition [Line Items]
Cash payments, net of cash acquired			116.0
Deferred payments, net			3.5
Contingent consideration liability			0.0
Aggregate purchase price			119.5
Net tangible assets acquired / (liabilities assumed)			(7.9)
Goodwill			84.4
Intangible assets			43.1
Clear-Structure
Business Acquisition [Line Items]
Cash payments, net of cash acquired			59.1
Deferred payments, net			2.1
Contingent consideration liability			7.0
Aggregate purchase price			68.3
Net tangible assets acquired / (liabilities assumed)			0.2
Goodwill			44.2
Intangible assets			23.9
Funds-Library
Business Acquisition [Line Items]
Cash payments, net of cash acquired			69.9
Deferred payments, net			0.0
Contingent consideration liability			0.0
Aggregate purchase price			69.9
Net tangible assets acquired / (liabilities assumed)			(3.1)
Goodwill			39.2
Intangible assets			33.8
Other Acquisitions
Business Acquisition [Line Items]
Cash payments, net of cash acquired			17.3
Deferred payments, net			1.7
Contingent consideration liability			0.0
Aggregate purchase price			19.1
Net tangible assets acquired / (liabilities assumed)			(2.2)
Goodwill			13.5
Intangible assets			$ 7.8