Annual report pursuant to Section 13 and 15(d)

Note 18 - Employee Benefit Plans - Weighted-average Assumptions Used to Determine the Projected Benefit Obligation (Details)

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Note 18 - Employee Benefit Plans - Weighted-average Assumptions Used to Determine the Projected Benefit Obligation (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
UNITED STATES | Pension Plan [Member]      
Projected benefit obligation      
Discount rate 3.11% 2.82% 3.59%
Rate of compensation increase 4.09% 4.09% 4.09%
Interest credit rate 5.15% 5.15% 5.15%
Net periodic pension cost      
Discount rate 2.82% 3.59% 4.39%
Rate of compensation increase 4.09% 4.09% 4.07%
Expected return on plan assets 7.52% 7.52% 7.52%
Interest credit rate 5.15% 5.15% 5.15%
UNITED STATES | Other Postretirement Benefits Plan [Member]      
Projected benefit obligation      
Discount rate 3.01% 2.63% 3.46%
Net periodic pension cost      
Discount rate 2.63% 3.46% 4.26%
Foreign Plan [Member] | Pension Plan [Member]      
Projected benefit obligation      
Discount rate 1.10% 0.69% 1.07%
Rate of compensation increase 2.77% 2.59% 2.65%
Interest credit rate 0.74% 0.33% 0.49%
Net periodic pension cost      
Discount rate 0.69% 1.07% 1.75%
Rate of compensation increase 2.59% 2.65% 2.64%
Expected return on plan assets 4.89% 5.89% 5.89%
Interest credit rate 0.33% 0.49% 1.04%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]      
Projected benefit obligation      
Discount rate 2.80% 2.30% 2.90%
Net periodic pension cost      
Discount rate 2.30% 2.90% 3.50%