Loans to and Investments in Associated Companies (National Beef) (Narrative) (Details)	3 Months Ended
	Feb. 28, 2019	Jun. 05, 2018	Jun. 04, 2018
National Beef
Schedule of Equity Method Investments [Line Items]
Ownership percentage			79.00%
Equity method investment, ownership percentage	31.00%	31.00%
Weighted average useful life	15 years
National Beef | Discontinued operations, disposed of by sale
Schedule of Equity Method Investments [Line Items]
Ownership percentage		48.00%