Quarterly report pursuant to Section 13 or 15(d)

Supplemental Balance Sheet Information - Remaining Performance Obligations (Details)

v3.8.0.1
Supplemental Balance Sheet Information - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
$ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue allocated to remaining performance obligations that are unsatisfied or partially unsatisfied $ 217
Performance obligations expected to be satisfied, expected timing 1 year