XML 87 R72.htm IDEA: XBRL DOCUMENT
v3.24.0.1

FAIR VALUE DISCLOSURES - Fair Value Disclosure of Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Level 1 |  |
Assets: |  |
Cash, restricted cash and cash equivalents | $ 999 | $ 1,137
Liabilities: |  |
Non-recourse asset-backed debt and Credit facilities and other secured borrowings | 0 | 0
Convertible senior notes | 0 | 0
Level 1 | Restricted Cash |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 541 | 654
Level 2 |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 0 | 0
Liabilities: |  |
Non-recourse asset-backed debt and Credit facilities and other secured borrowings | 2,150 | 4,427
Convertible senior notes | 296 | 391
Level 2 | Restricted Cash |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 0 | 0
Reported Value Measurement |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 999 | 1,137
Liabilities: |  |
Non-recourse asset-backed debt and Credit facilities and other secured borrowings | 2,134 | 4,396
Convertible senior notes | 376 | 959
Reported Value Measurement | Restricted Cash |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 541 | 654
Estimate of Fair Value Measurement |  |
Assets: |  |
Cash, restricted cash and cash equivalents | 999 | 1,137
Liabilities: |  |
Non-recourse asset-backed debt and Credit facilities and other secured borrowings | 2,150 | 4,427
Convertible senior notes | 296 | 391
Estimate of Fair Value Measurement | Restricted Cash |  |
Assets: |  |
Cash, restricted cash and cash equivalents | $ 541 | $ 654

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

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References No definition available. + Details
Name: | us-gaap_ConvertibleDebtFairValueDisclosures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time. + References No definition available. + Details
Name: | us-gaap_LinesOfCreditFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=open_RestrictedCashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |