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Joint Venture - Narrative (Details)
¥ in Millions
Aug. 21, 2019
USD ($)
Aug. 21, 2019
JPY (¥)
Aug. 21, 2018
USD ($)
Aug. 21, 2018
JPY (¥)
Jun. 30, 2020
USD ($)
Aug. 21, 2019
JPY (¥)
Schedule of Equity Method Investments [Line Items]            
Additional investor contribution $ 1,500,000         ¥ 156.0
Redemption value of redeemable non-controlling interest         $ 0  
New Relic K.K            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage, parent         60.00%  
The Investors            
Schedule of Equity Method Investments [Line Items]            
Contributions for joint venture $ 1,000,000.0 ¥ 104.0 $ 3,600,000 ¥ 396.0    
The Investors | New Relic K.K            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage, noncontrolling interest     40.00% 40.00%