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Income Taxes (Reconciliation of Income Tax Provision) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
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 0.50% 1.20% 2.30%
Routine tax incentives (3.50%) (5.80%) (4.30%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 1.40% 1.50% 0.80%
Statutory rates other than U.S. statutory rate 2.40% 2.40% 2.70%
Valuation allowance 1.30% 2.40% 0.70%
Other - net [1] (1.90%) (1.20%) (0.10%)
Effective income tax rate 21.20% 21.50% 23.10%
Deferred tax assets, prepaid royalties $ 56 $ 117  
[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.