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Note 19 - Port-retirement Benefits - Key Assumptions (Details) - UNITED KINGDOM - Pension Plan [Member]
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Discount rate 1.80% 1.30% 2.00%
Expected return on plan assets 3.20% 2.70% 3.40%
Expected rate of salary increases 0.10% 0.10% 0.10%