Interim Financial Data by Segment - Amortization of Acquired Intangibles and Purchased Intellectual Property by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	$ 62.5	$ 32.6	$ 131.2	$ 64.9
Other
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	0.0	0.4	0.0	0.7
Foreign currency exchange
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	(1.3)	(0.7)	(1.9)	(1.7)
Investor Communication Solutions | Operating Segments
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	16.2	22.2	37.1	44.5
Global Technology and Operations | Operating Segments
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	$ 47.6	$ 10.7	$ 96.0	$ 21.4