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Corporate Investments and Funds Held for Clients - Schedule of Investment of Funds Held for Clients (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | [1]
--- | --- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Restricted cash and cash equivalents held to satisfy client funds obligations | $ 14,387.8 | [1] | $ 7,172.6 | $ 12,238.0
Total funds held for clients | 47,407.7 |  | 37,996.1 |
Current |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Restricted short-term and long term marketable securities held to satisfy client funds obligations | 6,807.9 |  | 5,538.1 |
Non-current |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Restricted short-term and long term marketable securities held to satisfy client funds obligations | $ 26,212.0 |  | $ 25,285.4 |
[1] | See Note 7 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.

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