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Settlement Assets and Obligations - Summary of Investment Securities in Unrealized Position (Details) $ in Millions | Jun. 30, 2025 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 | 113
Fair value less than one year | $ 248.8
Unrealized losses less than one year | $ (4.3)
Number of securities one year or greater | Securities | 212
Fair value one year or greater | $ 468.0
Unrealized losses one year or greater | $ (24.9)
Corporate debt securities |
Summary of Investment Holdings [Line Items] |
Number of securities one year or greater | Securities | 8
Fair value one year or greater | $ 33.3
Unrealized losses one year or greater | $ (2.1)
United States government agency mortgage-backed securities |
Summary of Investment Holdings [Line Items] |
Number of securities one year or greater | Securities | 8
Fair value one year or greater | $ 4.4
Unrealized losses one year or greater | $ (0.1)

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