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v3.20.4

Investment in Unconsolidated Affiliate - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Feb. 15, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments in unconsolidated affiliates | $ 2,756 | $ 2,720 |  |
Cash distributions from unconsolidated affiliate | 151 | 136 | $ 2 |
Distributions from unconsolidated affiliates | 109 | 113 | $ 0 |
Equity securities without readily determinable fair value | 160 | 167 |  |
Line of Credit | Revolving Credit Facility |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 3,500
Line of Credit | Variable-Rate Term Loan Facilities Due March 2023 | Term Loan Facilities |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Maximum borrowing capacity | 385 |  |  |
Line of Credit | Variable-Rate Revolving Credit Facilities Due March 2023 | Revolving Credit Facility |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Maximum borrowing capacity | 45 |  |  |
Amount outstanding | $ 13 |  |  |
Investment Services Business |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Controlling interest sold (as a percent) | 40.00% |  |  |
Fiserv LS LLC |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Controlling interest sold (as a percent) | 45.00% |  |  |
Merchant Alliances |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments in unconsolidated affiliates | $ 2,400 | 2,500 |  |
Affiliated Entity |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments in unconsolidated affiliates | $ 212 | $ 56 |  |

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