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Revenue - Remaining Performance Obligations (Detail 1)
Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-04-01  
Remaining Performance Obligations [Line Items]  
Remaining performance obligations, expected satisfaction, percentage 72.00%
Remaining performance obligations, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-01  
Remaining Performance Obligations [Line Items]  
Remaining performance obligations, expected satisfaction, percentage 28.00%
Remaining performance obligations, expected timing of satisfaction