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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, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | [1]
--- | --- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Restricted cash and cash equivalents held to satisfy client funds obligations | $ 14,526.3 | [1] | $ 5,145.1 | $ 11,814.7
Total funds held for clients | 36,866.2 |  | 26,708.1 |
Current |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale securities, restricted | 4,768.3 |  | 5,541.2 |
Non-current |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Available-for-sale securities, restricted | $ 17,571.6 |  | $ 16,021.8 |
[1] | See Note 6 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.

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- Definition Sum of the carrying amounts as of the balance sheet date of current and noncurrent investments of funds held for clients. Client fund assets represent assets that, based upon the Company's intent, are restricted for use solely for the purposes of satisfying the obligations to remit funds relating to the Company's payroll and payroll tax filing services. + References No definition available. + Details
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