XML 51 R41.htm IDEA: XBRL DOCUMENT
v3.23.2

REAL ESTATE INVENTORY - Schedule of Real Estate Inventory (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Inventory Disclosure [Abstract] |  |
Work in progress | $ 252 | $ 891
Finished goods: |  |
Listed for sale | 563 | 2,788
Under contract for sale | 334 | 781
Total real estate inventory | $ 1,149 | $ 4,460

X
- Definition Finished Goods + References No definition available. + Details
Name: | open_FinishedGoodsAbstract
Namespace Prefix: | open_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory, Real Estate, In Resale Contract + References No definition available. + Details
Name: | open_InventoryRealEstateInResaleContract
Namespace Prefix: | open_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total of (1) improvements, (2) held-for-sale, (3) land and land under development, (4) construction-in-process, (5) mortgage loans held-in-inventory, and (6) other real estate investments which are considered inventory due to being held for sale or disposition. + References No definition available. + Details
Name: | us-gaap_InventoryRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost of real estate projects incurred for projects for eventual sale or transfer (condominium or time share projects, vacation clubs). + References No definition available. + Details
Name: | us-gaap_InventoryRealEstateConstructionInProcess
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents properties which were acquired directly or through foreclosure for which a committed plan to sell exists and an active program to market such properties has been initiated. + References No definition available. + Details
Name: | us-gaap_InventoryRealEstateHeldForSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant