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BUSINESS COMBINATIONS (Details) $ / shares in Units, $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 04, 2022 USD ($) | Nov. 03, 2021 USD ($) | Sep. 03, 2021 USD ($) | Dec. 18, 2020 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
GOODWILL |  |  |  |  | $ 4 | $ 60 |
Common Stock |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Equity issuance costs |  |  |  |  | $ 0 | $ 29 | $ 43
Transaction with Social Capital Hedosophia Holdings Corp. II I Common Stock |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Consideration received due to reverse recapitalization |  |  |  | $ 377 |  |  |
PIPE shares issued by Social Capital Hedosophia Holdings Corp. II (in shares) | shares |  |  |  | 60,005,000 |  |  |
Common stock price per PIPE Shares (in dollars per share) | $ / shares |  |  |  | $ 10.00 |  |  |
Total PIPE shares investment |  |  |  | $ 600 |  |  |
Exchange ratio upon business combination with Social Capital Hedosophia Holdings Corp. II |  |  |  | 1.618 |  |  |
Opendoor Technologies Inc. Common Stock | Common Stock |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Equity issuance costs |  |  |  | $ 44 |  |  |
Services Labs, Inc. |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Acquisition of outstanding equity (in percent) |  |  | 100.00% |  |  |  |
Cash consideration |  |  | $ 22 |  |  |  |
Pro.com |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
GOODWILL |  |  | 16 |  |  |  |
Pro.com | Technology-Based Intangible Assets |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Acquired intangible assets |  |  | $ 4 |  |  |  |
Remaining Weighted Average Useful Life (Years) |  |  | 1 year |  |  |  |
RedDoor |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Total PIPE shares investment |  | $ 15 |  |  |  |  |
GOODWILL |  | 13 |  |  |  |  |
Cash consideration paid out after closing |  | $ 2 |  |  |  |  |
Length of time after closing when deferred payment is due | 1 year | 1 year |  |  |  |  |
RedDoor | Technology-Based Intangible Assets |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Acquired intangible assets |  | $ 3 |  |  |  |  |
Remaining Weighted Average Useful Life (Years) |  | 1 year |  |  |  |  |
TaxProper |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Total PIPE shares investment | $ 10 |  |  |  |  |  |
GOODWILL | 2 |  |  |  |  |  |
Cash consideration paid out after closing | 3 |  |  |  |  |  |
TaxProper | Technology-Based Intangible Assets |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Acquired intangible assets | $ 7 |  |  |  |  |  |
Remaining Weighted Average Useful Life (Years) | 2 years |  |  |  |  |  |

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