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Discontinued Operations - Restructuring (Details) - Zillow Offers Operations - Disposal Group, Disposed of By Means Other Than Sale, Wind-Down - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges	$ 0	$ 85,000,000
Cumulative Amount Recognized		150,000,000
Inventory write-down
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		9,000,000
Employee termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		20,000,000
Cumulative Amount Recognized		72,000,000
Financing-related charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		37,000,000
Cumulative Amount Recognized		43,000,000
Contract termination costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		4,000,000
Cumulative Amount Recognized		14,000,000
Accelerated depreciation and amortization
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		14,000,000
Cumulative Amount Recognized		19,000,000
Asset write-offs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		0
Cumulative Amount Recognized		1,000,000
Other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		1,000,000
Cumulative Amount Recognized		1,000,000
Total other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring charges		76,000,000
Cumulative Amount Recognized		$ 150,000,000

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