Subsequent Event	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventAmendment of Credit Facility AgreementOn January 3, 2022, certain wholly owned subsidiaries of Zillow Group amended the credit agreement with Credit Suisse AG, Cayman Islands (“Credit Suisse”) that provides capital for Zillow Offers such that Credit Suisse will waive one half of any prepayment fees that may apply under the existing contract and no further advances may be made under the credit agreement. In addition, after January 31, 2022, no further eligible properties may be added to the borrowing base. When outstanding amounts drawn under the credit agreement fall below specified levels, cash available for distribution must first be applied to the repayment of outstanding principal amounts, and in any event beginning on March 31, 2022, cash available for distribution must be applied to the repayment of outstanding principal amounts until all outstanding amounts are repaid.