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Settlement Assets and Obligation - Summary of Investment Securities in Unrealized Position (Details) $ in Millions | Jun. 30, 2023 USD ($) Securities
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State and municipal debt securities |
Summary of Investment Holdings [Line Items] |
Number of securities less than one year | Securities | 111
Fair value less than one year | $ 296.5
Unrealized losses less than one year | $ (5.6)
Number of securities one year or greater | Securities | 267
Fair value less than one year | $ 609.4
Unrealized losses one year or greater | $ (62.5)
Asset-backed securities |
Summary of Investment Holdings [Line Items] |
Number of securities less than one year | Securities | 28
Fair value less than one year | $ 163.8
Unrealized losses less than one year | $ (0.8)
Corporate debt securities |
Summary of Investment Holdings [Line Items] |
Number of securities less than one year | Securities | 28
Fair value less than one year | $ 84.3
Unrealized losses less than one year | $ (1.3)
Number of securities one year or greater | Securities | 11
Fair value less than one year | $ 40.5
Unrealized losses one year or greater | $ (5.2)
United States government agency mortgage-backed securities |
Summary of Investment Holdings [Line Items] |
Number of securities less than one year | Securities | 6
Fair value less than one year | $ 5.2
Unrealized losses less than one year | $ (0.2)
Number of securities one year or greater | Securities | 7
Fair value less than one year | $ 10.7
Unrealized losses one year or greater | $ (0.6)

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