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Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details) - ASC 2014-09
$ in Millions
Feb. 01, 2019
USD ($)
Recently Adopted Accounting Pronouncements  
Cumulative effect adjustment to opening accumulated deficit, net of tax $ 23.4
Reduction in the amortization of deferred contract acquisition costs 23.7
Reduction in revenue $ 0.3