Significant Accounting Policies - Initial Public Offering and Follow-Up Offering By Selling Stockholders (Details) $ / shares in Units, $ in Millions	Jun. 05, 2020 $ / shares shares	Aug. 01, 2019 USD ($) $ / shares shares	Jul. 31, 2019 shares
IPO
Subsidiary, Sale of Stock [Line Items]
Number of shares sold and issued (in shares) | shares		38,873,174
Sale of stock price per share (USD per share) | $ / shares		$ 16.00
Gross proceeds received in public offering | $		$ 622.0
Proceeds from sale of stock, net of offering costs | $		585.3
Payment of underwriting discounts, commissions and estimated offering related expense | $		$ 36.7
IPO, Sale of Stockholders
Subsidiary, Sale of Stock [Line Items]
Number of shares sold and issued (in shares) | shares	34,500,000
Sale of stock price per share (USD per share) | $ / shares	$ 35.00
Common Class A
Subsidiary, Sale of Stock [Line Items]
Conversion of stock, conversion ratio		1
Dynatrace Holdings LLC
Subsidiary, Sale of Stock [Line Items]
Common stock, issued during the exchange (in shares) | shares			241,547,218