Revenue Recognition - Timing of Performance Obligation (Details) |
3 Months Ended |
|---|---|
Jun. 30, 2018 | |
| Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Contractual arrangements with customers | 1 year |