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Settlement Assets and Obligations - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2019 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Receivables from agents, business solutions customers, and others, net | $ 1,175.1 |  | $ 1,135.1
Provision for doubtful accounts |  | $ 47.1 |
Advances to agents | $ 146.9 |  | 135.9
Variable rate demand notes, maximum maturity year | 2050 |  |
Due after 10 years | $ 157.3 |  |
Receivables from agents and others |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Receivables from agents, business solutions customers, and others, net | 1,125.9 |  | 1,081.2
Receivables from Business Solutions customers |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Receivables from agents, business solutions customers, and others, net | 49.2 |  | $ 53.9
State and municipal variable rate demand notes |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Due after 10 years | $ 84.8 |  |

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