Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Millions	Additional Paid-in Capital [Member]	Earnings Invested In The Business [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Class A [Member]	Common Class B [Member]	Common Class A Treasury Stock [Member]	Common Class B Treasury Stock [Member]	Total
Balance at Dec. 30, 2012	$ 27.1	$ 700.0	$ 35.4	$ 36.6	$ 3.5	$ (61.0)	$ (0.6)
Other comprehensive income, net of tax			5.3					5.3
Net earnings		12.9						12.9
Dividends		(1.9)
Issuance of restricted stock and other	0.7
Issuance of restricted stock and other						0.5
Balance at Mar. 31, 2013	27.8	711.0	40.7	36.6	3.5	(60.5)	(0.6)	758.5
Balance at Dec. 29, 2013	26.0	751.3	61.4	36.6	3.5	(55.6)	(0.6)	822.6
Other comprehensive income, net of tax			0.3					0.3
Net earnings		2.5						2.5
Dividends		(1.9)
Issuance of restricted stock and other	1.5
Issuance of restricted stock and other						0.2
Balance at Mar. 30, 2014	$ 27.5	$ 751.9	$ 61.7	$ 36.6	$ 3.5	$ (55.4)	$ (0.6)	$ 825.2