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Regulation and Equity - Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Aug. 03, 2021
Class of Stock [Line Items] |  |  |  |
Stock repurchase program number of shares authorized (in shares) |  |  |  | 25,000,000
Treasury stock repurchased | $ 4 | $ 549 | $ 461 |
FNF Common Stock | Share Repurchase Program |  |  |  |
Class of Stock [Line Items] |  |  |  |
Treasury stock repurchased (in shares) | 100,000 |  |  |
Treasury stock repurchased | $ 4 |  |  |
Treasury stock acquired (in usd per share) | $ 38.45 |  |  |

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