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Shareholder's Equity/Member's Deficit (Details) - $ / shares
9 Months Ended
Jul. 31, 2019
Mar. 31, 2019
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Mar. 31, 2018
Class of Stock [Line Items]              
Common share, authorized (in shares)     600,000,000        
Par value (in USD per share)     $ 0.001        
Common units, outstanding (in units)   100         100
Common units, issued during the exchange (in shares)   241,018,831          
Common shares, issued (in shares)     280,784,786        
Common shares, outstanding (in shares)     280,784,786        
Dynatrace Holdings LLC              
Class of Stock [Line Items]              
Common units, outstanding (in units) 241,547,218            
Common units, issued during the exchange (in shares)       241,547,218      
Common units, issued (in shares) 19,525,510 241,018,731          
Management Incentive Units and Appreciation Units              
Class of Stock [Line Items]              
Common units, issued (in shares) 16,687,436 14,804,226          
Common Stock              
Class of Stock [Line Items]              
Effect of reorganization (in shares)   241,547,118 241,547,000        
Common units, issued (in shares)     38,873,000        
Common shares, outstanding (in shares)   0 280,785,000 280,509,000 0 0 0