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Stockholders' Equity - Share-Based Awards Available for Grant (Details)
 9 Months Ended
Jan. 21, 2022
Jan. 20, 2022
shares
Apr. 30, 2022
shares
Shares Available for Grant      
Shares available for grant, beginning balance     16,851,000
Additional shares authorized     19,903,000
Restricted stock units granted     (4,519,000)
Options granted     0
Share-based awards canceled/forfeited/expired     3,339,000
Shares available for grant, ending balance     35,574,000
Pool shares reduced for each share granted 0   2.3
Pool shares increased for each share forfeited   2.3 2.3
Additional shares authorized     19,903,000
Amended and Restated 2005 Equity Incentive Plan      
Shares Available for Grant      
Additional shares authorized   18,000,000  
Additional shares authorized   18,000,000  
Shares Previously Available Under Credit Karma Plan      
Shares Available for Grant      
Additional shares authorized   1,902,811  
Additional shares authorized   1,902,811