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Settlement Assets and Obligations - Components of Investment Securities (Parenthetical) (Details) $ in Millions	Sep. 30, 2022 USD ($) Securities
Summary of Investment Holdings [Line Items]
Number of investment securities | Securities	430
Number of investment securities for less than twelve months | Securities	386
Number of investment securities for greater than twelve months | Securities	44
Unrealized loss position for less than twelve months	$ 77.7
Unrealized loss position for greater than twelve months	13.0
Total fair value loss position for less than twelve months	918.2
Total fair value loss position for greater than twelve months	$ 80.5

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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