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Related Party Transactions (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Related Party Transaction |  |  |
Dividends paid | $ 868 | $ 656 | $ 421
Capco Consulting Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Related Party Transaction |  |  |
Equity method investments | $ 137 | $ 142 |
Cardinal Holdings |  |  |
Related Party Transaction |  |  |
Ownership percentage (percent) | 36.00% | 37.00% |
Banco Bradesco | Joint venture |  |  |
Related Party Transaction |  |  |
Ownership percentage (percent) |  |  | 51.00%
Banco Bradesco |  |  |
Related Party Transaction |  |  |
Total related party revenues |  |  | $ 332
Banco Bradesco | Joint venture |  |  |
Related Party Transaction |  |  |
Dividends paid |  |  | $ 26

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