Segment Information - Additional Information (Details1) $ in Millions	Sep. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01
Segment Reporting Information [Line Items]
Revenue, remaining performance obligation, amount	$ 362
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-01
Segment Reporting Information [Line Items]
Revenue, remaining performance obligation, amount	$ 1,900
Revenue, remaining performance obligation, expected timing of satisfaction, period