Share-Based Payments - Total Shareholder Return Units Narrative (Details) - Total Shareholder Return Units (TSRUs) [Member] |
12 Months Ended |
|---|---|
|
Dec. 31, 2019
trading_day
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Trading day average used to calculate the conversion | 20 |
| Age of eligible unit holder which can elect to exercise and convert TSRUs when vested into PTUs | 55 years |
| Award requisite service period | 10 years |
| Minimum [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Contractual term (years) | 5 years |
| Maximum [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Contractual term (years) | 7 years |