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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Loss Contingencies [Line Items] |  |  |
Subscriber funds |  | $ 1,700 | $ 2,000
First Data | First Data Subsidiary Merchant Matters |  |  |
Loss Contingencies [Line Items] |  |  |
Payment for legal settlement | $ 40 |  |
Loss contingency accrual |  | 32 | $ 43
First Data | First Data Subsidiary Merchant Matters | Minimum |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated range of exposure |  | 0 |
First Data | First Data Subsidiary Merchant Matters | Maximum |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated range of exposure |  | $ 60 |

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