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ASC 606 Adoption Impact and Revenue from Contracts with Customers - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
$ in Millions
Jun. 30, 2018
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligations $ 64.0
Percentage of remaining performance obligations expected to be recognized over the next 24 months 75.00%
Remaining performance obligations recognition period 2 years