Income Taxes (Reconciliation Of The Statutory Federal Income Tax Rate To The Company's Effective Tax Rate On Earnings) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit (as a percent)	0.90%	1.40%	1.50%
Foreign earnings taxed at rates other than the U.S. statutory rate (as a percent)	(0.20%)	(3.80%)	(2.80%)
Foreign currency remeasurement (as a percent)	0.50%	0.60%	0.00%
Income tax adjustments to filed returns (as a percent)	(0.40%)	(0.10%)	0.70%
Biodiesel credit (as a percent)	(1.70%)	(1.20%)	(1.90%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(1.50%)	(1.20%)	(2.00%)
Effective tax rate reconciliation, U.S. taxation of foreign income, percent	1.20%	0.20%	0.00%
Valuation allowance (as a percent)	(0.20%)	0.00%	0.70%
Other (as a percent)	(0.30%)	(0.30%)	0.20%
Effective income tax rate	19.30%	16.60%	17.40%