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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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