Interim Financial Data by Segment - Schedule of Amortization of Acquired Intangibles and Purchased Intellectual Property by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	$ 49.9	$ 53.7	$ 100.7	$ 109.5
Investor Communication Solutions | Operating Segments
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	11.4	14.9	22.8	30.4
Global Technology and Operations | Operating Segments
Segment Reporting Information [Line Items]
Amortization of acquired intangibles and purchased intellectual property	$ 38.5	$ 38.8	$ 77.9	$ 79.1