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Discontinued Operations - Restructuring (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Employee termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cumulative Amount Recognized		$ 10
Zillow Offers Operations | Employee termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cumulative Amount Recognized	$ 33
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	85	482
Cumulative Amount Recognized	567
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Inventory write-down
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	9	408
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Employee termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	20	52
Cumulative Amount Recognized	72
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Financing-related charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	37	6
Cumulative Amount Recognized	43
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Contract termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	4	10
Cumulative Amount Recognized	14
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Accelerated depreciation and amortization
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	14	5
Cumulative Amount Recognized	19
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Asset write-offs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	0	1
Cumulative Amount Recognized	1
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	1	0
Cumulative Amount Recognized	1
Zillow Offers Operations | Disposal Group, Disposed of By Means Other Than Sale, Wind-Down | Total other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	76	$ 74
Cumulative Amount Recognized	$ 150

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