Quarterly report pursuant to Section 13 or 15(d)

Revenue - Remaining Performance Obligations (Details)

v3.10.0.1
Revenue - Remaining Performance Obligations (Details)
$ in Millions
Sep. 30, 2018
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 1,410
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, percentage 5.00%
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, percentage 15.00%