Discontinued Operations - Major Line Items Included in Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating expenses:
Net loss from discontinued operations	$ 0	$ (2)	$ 0	$ (11)
Discontinued Operations, Disposed Of By Means Other Than Sale, Wind Down | Zillow Offers Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		505		4,226
Cost of revenue		469		3,999
Gross profit		36		227
Operating expenses:
Sales and marketing		19		152
Technology and development		0		6
General and administrative		3		10
Restructuring costs		1		25
Total operating expenses		23		193
Income from discontinued operations		13		34
Loss on extinguishment of debt		(7)		(21)
Other income		7		13
Interest expense		0		(36)
Income (loss) from discontinued operations before income taxes		13		(10)
Income tax expense		(15)		(1)
Net loss from discontinued operations		$ (2)		$ (11)
Net loss from discontinued operations per share:
Basic (usd per share)		$ (0.01)		$ (0.04)
Diluted (usd per share)		$ (0.01)		$ (0.04)