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v3.20.1

Shareholders' equity and dividends - narrative (Details) | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2019 NOK (kr) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares | Dec. 31, 2018 NOK (kr) $ / shares shares | Feb. 04, 2020 USD ($) | Dec. 31, 2019 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($) $ / shares shares
Total number of shares issued | shares | 3,338,661,219 |  | 3,338,661,219 |  | 3,338,661,219 |  | 3,338,661,219
Dividends declared per share | $ / shares | $ 0.27 |  |  |  |  |  |
Increase (decrease) through treasury share transactions, equity |  | $ (500,000,000) |  |  |  |  |
United States Dollar (USD) [Member] |  |  |  |  |  |  |
Share capital |  |  |  |  | $ 1,184,547,766 |  | $ 1,184,547,766
Dividends declared per share | $ / shares |  | $ 1.04 | $ 0.92 |  |  |  |
Norwegian kroner (NOK) [Member] |  |  |  |  |  |  |
Share capital | kr | $ 8,346,653,047.5 |  | $ 8,346,653,047.5 |  |  |  |
Nominal value per share | $ / shares |  |  |  |  | $ 2.5 |  | $ 2.5
Share buyback programme [Member] |  |  |  |  |  |  |
Treasury shares purchased |  | $ 442,000,000 |  |  |  |  |
Number of shares outstanding | shares | 23,578,410 |  | 0 |  | 23,578,410 |  | 0
Treasury Shares |  |  |  |  |  | $ 5,000,000,000 |
Share buyback programme [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |
Increase (decrease) through treasury share transactions, equity |  | $ (500,000,000) |  |  |  |  |
Treasury Shares |  |  |  | $ 1,500,000,000 |  |  |
Agreement to buy treasury shares |  |  |  |  | $ 500,000,000 |  |
Share buyback programme [Member] | Share-based Payment Arrangement, Tranche One [Member] | Norwegian State [Member] |  |  |  |  |  |  |
Agreement to buy treasury shares |  |  |  |  | $ 1,000,000,000 |  |

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