Short And Long-Term Debt Senior Secured Credit Facility (Details) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Letter of Credit, borrowing capacity	$ 150
Maximum \| Required Covenant Ratio
Debt Instrument [Line Items]
Senior secured leverage ratio	4.75
Ratio of Indebtedness to Net Capital Denominator	1.00
ABR
Debt Instrument [Line Items]
Description of variable interest rate basis	ABR
SOFR
Debt Instrument [Line Items]
Description of variable interest rate basis	SOFR
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility borrowing capacity	$ 1,100
Line of Credit \| Revolving Credit Facility \| ABR \| Greater than 3.50 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	1.50%
Line of Credit \| Revolving Credit Facility \| ABR \| Less than or equal to 3.50 to 1.00 but greater than or equal to 2.50 to 1.00 [Member]
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	1.25%
Line of Credit \| Revolving Credit Facility \| ABR \| Less than 2.50 to 1.00 but greater than or equal to 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	1.00%
Line of Credit \| Revolving Credit Facility \| ABR \| Less than 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	0.75%
Line of Credit \| Revolving Credit Facility \| SOFR \| Greater than 3.50 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	2.50%
Line of Credit \| Revolving Credit Facility \| SOFR \| Less than or equal to 3.50 to 1.00 but greater than or equal to 2.50 to 1.00 [Member]
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	2.25%
Line of Credit \| Revolving Credit Facility \| SOFR \| Less than 2.50 to 1.00 but greater than or equal to 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	2.00%
Line of Credit \| Revolving Credit Facility \| SOFR \| Less than 2.00 to 1.00
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate	1.75%
Convertible Debt \| 0.25% Exchangeable Senior Notes
Debt Instrument [Line Items]
Interest Rate	0.25%

Maximum borrowing capacity under the letter of credit facility.

No definition available.

Name:	hous_LetterOfCreditBorrowingCapacity
Namespace Prefix:	hous_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ratio of Indebtedness to Net Capital Denominator

+ References

No definition available.

+ Details

Name:	hous_RatioOfIndebtednessToNetCapitalDenominator
Namespace Prefix:	hous_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of reference rate used for variable rate of debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	hous_DebtCovenantRatioAxis=hous_RequiredCovenantRatioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hous_InterestRateTypeAxis=hous_AbrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hous_InterestRateTypeAxis=hous_SOFRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hous_SeniorSecuredLeverageRatioScenarioAxis=hous_Greaterthan3.50to1.00Member
Namespace Prefix:
Data Type:	na
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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
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- Details

Name:	us-gaap_DebtInstrumentAxis=hous_A025ExchangeableSeniorNotesMember
Namespace Prefix:
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