Stock Based and Other Management Compensation - Shares Authorized for Distribution (Details) - shares |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
---|---|---|---|
Stock options | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 229,250,000 | 979,790,000 | 0 |
Deferred share units | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 31,829,000 | 42,243,000 | 0 |
Restricted stock units | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 260,640,000 | 6,740,000 | 0 |