Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Remaining Performance Obligation (Details)

v3.10.0.1
Revenue Recognition - Remaining Performance Obligation (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Revenue from Contract with Customer [Abstract]  
Revenue, remaining performance obligation, amount $ 320
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, percentage 65.00%