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Income Taxes (Reconciliation of Income Tax Provision) (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Taxes      
U.S. statutory rate applied to income before income taxes and equity interests 21.00% 21.00% 21.00%
State income taxes, net of federal tax benefit 1.00% 0.50% 1.20%
Routine tax incentives (3.90%) (3.50%) (5.80%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 2.40% 1.40% 1.50%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent 1.10% 2.40% 2.40%
Valuation allowance 2.80% 1.30% 2.40%
Effective Income Tax Reconciliation, Impairment of intangible assets, Percent (1.40%) 0.00% 0.00%
Other - net [1] (0.60%) (1.90%) (1.20%)
Effective income tax rate 22.40% 21.20% 21.50%
[1] Other - net is composed of numerous items, none of which is greater than 1.05 percent of income before income taxes and equity interests.