v3.24.0.1
Income Taxes: (Schedule of Reasons Attributable to the Differences Between Effective Income Tax Rate And Federal Statutory Rate) (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Increase (decrease) resulting from:      
U.S. federal statutory rate 21.00% 21.00% 21.00%
Foreign rate differences (1.00%) (0.50%) (0.30%)
Dividend repatriation cost 0.80% 0.70% 0.60%
Global intangible low-taxed income 2.00% 1.00% 0.80%
U.S. state taxes (0.10%) 0.10% 0.20%
Foreign derived intangible income (0.90%) (0.80%) (0.70%)
Foreign exchange (1.60%) (1.70%) 0.00%
Non-deductible goodwill impairment 1.30% 0.00% 0.00%
Other (0.80%) (0.50%) 0.20%
Effective tax rate 22.40% 19.30% 21.80%
Russia      
Increase (decrease) resulting from:      
Unremitted earnings of Russian subsidiaries 0.017 0 0