Capital Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			9 Months Ended
	Mar. 03, 2015	Mar. 04, 2014	Sep. 27, 2015	Sep. 28, 2014	Sep. 25, 2015	Sep. 26, 2014
Schedule of Capitalization, Equity [Line Items]
Performance Unit Award Agreement expense recognized			$ 5.7	$ 2.3
Share price					$ 189.13	$ 75.74
Class B Common Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Performance units awarded	40,000	40,000
Performance units awards settled in cash			19,080	19,100
Increase in total number of shares outstanding			20,920	20,900