Share-Based Payments - Stock Option Narrative (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Granted, shares | 1,372,000 |
| Employee Stock Option [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period | 3 years |
| Contractual term (years) | 10 years |
| Holding period | 1 year |
| Exercise period in the event of a divestiture or restructuring | 3 months |
| Management [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Granted, shares | 0 |