Investment in Nikola - Additional Information (Detail) - Nikola Corporation - USD ($)		3 Months Ended
	Jun. 03, 2020	Aug. 31, 2020
Marketable Securities [Line Items]
Marketable securities effective date		Jun. 03, 2020
Marketable securities number of shares owned	19,048,020
Marketable securities pre-tax earnings		$ 796,141,000
Marketable securities realized pre-tax gain		$ 508,511,000
Number of shares sold or contributed		12,000,000
Marketable securities unrealized market to market gain		$ 287,630,000
Number of shares of common stock marketable securities		7,048,020
Incremental expenses on gains from marketable securities		$ 49,511,000
Profit sharing and bonus expense on marketable securities gain		28,858,000
Marketable securities contribution expense		$ 20,653,000
Number of shares contributed of marketable securities		500,000