Corporate Investments And Funds Held For Clients - Schedule of Investment of Funds Held for Clients (Details) - USD ($) $ in Millions		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Marketable Securities [Line Items]
Restricted cash and cash equivalents held to satisfy client funds obligations	[1]	$ 1,706.8	$ 7,172.6	$ 6,688.0
Total funds held for clients		30,985.7	37,996.1
Current
Marketable Securities [Line Items]
Restricted short-term and long term marketable securities held to satisfy client funds obligations		3,155.7	5,538.1
Long-term
Marketable Securities [Line Items]
Restricted short-term and long term marketable securities held to satisfy client funds obligations		$ 26,123.2	$ 25,285.4

[1] See Note 5 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.