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Acquisitions and Dispositions - Gross Carrying Amount and Weighted-Average Useful Life Allocated to Intangible Assets (Details) - USD ($) $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Dec. 20, 2022 | Apr. 01, 2022 | Sep. 01, 2022 | Jun. 30, 2023
Merchant One, Inc. |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | $ 118 |  |  | $ 118
Weighted-Average Useful Life | 9 years |  |  |
Merchant One, Inc. | Residual buyouts |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | $ 83 |  |  |
Weighted-Average Useful Life | 9 years |  |  |
Merchant One, Inc. | Customer relationships |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | $ 35 |  |  |
Weighted-Average Useful Life | 10 years |  |  |
Finxact, Inc. |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 105 |  |
Weighted-Average Useful Life |  | 6 years |  |
Finxact, Inc. | Customer relationships |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 6 |  |
Weighted-Average Useful Life |  | 8 years |  |
Finxact, Inc. | Acquired software and technology |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 90 |  |
Weighted-Average Useful Life |  | 6 years |  |
Finxact, Inc. | Trade name |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 9 |  |
Weighted-Average Useful Life |  | 5 years |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  |  | $ 23 |
Weighted-Average Useful Life |  |  | 9 years |
Series of Individually Immaterial Business Acquisitions | Customer relationships |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  |  | $ 11 |
Weighted-Average Useful Life |  |  | 10 years |
Series of Individually Immaterial Business Acquisitions | Acquired software and technology |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  |  | $ 12 |
Weighted-Average Useful Life |  |  | 7 years |

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