Corporate Investments And Funds Held For Clients - Schedule of Investment of Funds Held for Clients (Details) - USD ($) $ in Millions		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Marketable Securities [Line Items]
Restricted cash and cash equivalents held to satisfy client funds obligations	[1]	$ 7,172.6	$ 6,688.0	$ 21,346.7
Total funds held for clients		37,996.1	36,333.6
Current
Marketable Securities [Line Items]
Restricted short-term and long term marketable securities held to satisfy client funds obligations		5,538.1	5,601.9
Long-term
Marketable Securities [Line Items]
Restricted short-term and long term marketable securities held to satisfy client funds obligations		$ 25,285.4	$ 24,043.7

[1] See Note 4 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.