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Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents |  | $ 2,361 | $ 1,650 | $ 1,245
Settlement activity, net | [1] | $ 711 | 405 | 182
Affiliated Entity |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents |  |  | $ 175 | 411
First Data |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents |  |  |  | $ 922
[1] | The company revised the consolidated statements of cash flows presentation to include cash and cash equivalents within settlement assets as a component of total cash and cash equivalents. The company revised the 2020 and 2019 presentation for comparable purposes. Additional information is included in Note 1.

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