Capital Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			6 Months Ended
	Mar. 03, 2015	Mar. 04, 2014	Jun. 28, 2015	Jun. 29, 2014	Jun. 26, 2015	Jun. 27, 2014
Schedule of Capitalization, Equity [Line Items]
Performance Unit Award Agreement expense recognized			$ 3.0	$ 1.5
Share price					$ 148.98	$ 74.56
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