v3.25.4
Share-Based Awards - Narrative (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 03, 2022
USD ($)
employee
$ / shares
shares
Jun. 09, 2020
shares
Aug. 08, 2019
shares
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock reserved for future issuance (in shares) | shares   12,000,000        
Zillow Group, Inc. 2020 Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in number of shares of common and capital stock available for issuance, percentage   5.00%        
Exercise price per share fixed   100.00%        
2019 Equity Inducement Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock reserved for future issuance (in shares) | shares     10,000,000      
Exercise price per share fixed     100.00%      
Option awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement by share-based payment award, fair value assumptions, exercise price (usd per share) | $ / shares $ 38.78          
Share-based payment arrangement, plan modification, number of awards impacted | shares 7,000,000          
Share-based payment arrangement, plan modification, number of grantees affected | employee 3,348          
Share-based payment arrangement, plan modification, expected incremental cost $ 66          
Unrecognized cost of unvested share-based compensation awards       $ 166    
Unrecognized compensation cost expected recognition period       2 years 1 month 6 days    
Total intrinsic value of shares       $ 167 $ 148 $ 20
Fair value of options       $ 154 214 215
Option awards | Zillow Group, Inc. 2020 Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share based compensation arrangement by share based payment, award maximum exercisable period       12 months    
Expiration period       10 years    
Vesting period       4 years    
Option awards | 2019 Equity Inducement Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share based compensation arrangement by share based payment, award maximum exercisable period       12 months    
Expiration period       10 years    
Share based compensation arrangement by share based payment, award minimum exercisable period       3 months    
Option awards | 2019 Equity Inducement Plan | Vesting, Option Two            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       4 years    
Unvested restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation cost expected recognition period       2 years 4 months 24 days    
Total fair value of awards vested       $ 315 $ 310 $ 292
Total unrecognized compensation cost       $ 530    
Unvested restricted stock units | Zillow Group, Inc. 2020 Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       4 years    
Unvested restricted stock units | 2019 Equity Inducement Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       4 years    
Share-Based Payment Arrangement            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement by share-based payment award, options, plan modification, grants in period, weighted average grant date fair value (usd per share) | $ / shares $ 67.58