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REAL ESTATE INVENTORY - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) home | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) home | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Inventory Disclosure [Abstract] |  |  |  |  |
Inventory valuation adjustments | $ 45 |  | $ 45 |  | $ 459
Number of homes under contract to be purchased | home | 1,390 |  | 1,390 |  |
Aggregate purchase price for homes | $ 469 |  | $ 469 |  |
Valuation adjustments | $ 14 | $ 82 | $ 37 | $ 90 |

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