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v3.21.1

Common Shareholders' Equity (Details 1) |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 02, 2020 $ / shares | Apr. 15, 2020 $ / shares | Dec. 31, 2020 $ / shares | Dec. 31, 2019 $ / shares | Dec. 31, 2018 $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 | Dec. 04, 2019 $ / shares | Apr. 17, 2019 $ / shares | Dec. 05, 2018 $ / shares | Apr. 11, 2018 $ / shares | Dec. 06, 2017 $ / shares
Interim dividend |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Common Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid date | Dec. 30, 2020 |  | Dec. 30, 2020 | Dec. 26, 2019 | Jan. 04, 2019 | Jan. 05, 2018 |  |  |  |  |  |
Dividend per Share | (per share) | $ 56 |  | $ 56.0000 | $ 75.0000 | $ 140.0000 | $ 70.0000 |  | $ 75 |  | $ 140 |  | $ 70
Year of dividend |  |  | 2020 | 2019 | 2018 | 2017 |  |  |  |  |  |
Final dividend |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Common Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid date |  | Apr. 24, 2020 |  | Apr. 24, 2020 | Apr. 29, 2019 | Apr. 26, 2018 |  |  |  |  |  |
Dividend per Share | (per share) |  | $ 179.95079 |  | $ 179.97079 | $ 358.33030 | $ 108.88833 |  |  | $ 35,833,030 |  | $ 108.88833 |
Year of dividend |  |  |  |  | 2018 | 2017 | 2019 |  |  |  |  |

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