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Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |
Other than temporary impairment losses, investments | $ 570 |  | $ 570 |  |
Investments in unconsolidated affiliates | 1,585 |  | 1,585 |  | $ 2,262
Equity securities without a readily determinable fair value | 137 |  | 137 |  | 156
Equity securities without readily determinable fair value, upward price adjustment, annual amount | $ 2 | $ 0 | $ 29 | $ 0 |
Wells Fargo Merchant Services (WFMS) |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |
Percentage of interest owned in affiliate | 40.00% |  | 40.00% |  |
Other than temporary impairment losses, investments | $ 570 |  |  |  |
Banc of America Merchant Services |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |
Investments in unconsolidated affiliates | $ 1,300 |  | $ 1,300 |  | $ 1,900

X
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