XML 74 R57.htm IDEA: XBRL DOCUMENT v3.22.4

REAL ESTATE INVENTORY - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) home	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Inventory Disclosure [Abstract]
Inventory adjustments	$ 459	$ 40
Amount of homes purchased under contract | home	1,011
Aggregate purchase price for homes	$ 331
Valuation adjustments	$ 737	$ 56	$ 8

X

- Definition

Inventory, Real Estate, Valuation Adjustment (Decrease) Increase

+ References

No definition available.

+ Details

Name:	open_InventoryRealEstateValuationAdjustmentDecreaseIncrease
Namespace Prefix:	open_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=116847112&loc=d3e4492-108314

+ Details

Name:	us-gaap_InventoryAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=123406679&loc=d3e25383-109308

+ Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The minimum number of units that must be purchased, in connection with an unconditional purchase obligation that has been recognized for financial reporting purposes.

+ References

No definition available.

+ Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationMinimumQuantityRequired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant