Consolidated Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Paid-in Capital	Earnings Invested in the Business	Accumulated Other Comprehensive Income	Comprehensive Income	Common Class A	Common Class A Treasury Stock	Common Class B	Common Class B Treasury Stock
Beginning balance at Dec. 28, 2008		$ 35.8	$ 676.0	$ 12.2		$ 36.6	$ (110.6)	$ 3.5	$ (0.6)
Conversion of capital stock
Sale of stock, exercise of stock options, restricted stock awards and other		1.1					4.0
Comprehensive income
Net earnings (loss)	(104.5)		(104.5)		(104.5)
Foreign currency translation adjustments, net of tax				12.3	12.3
Unrealized (losses) gains on investments, net of tax				1.6	1.6
Pension liability adjustments, net of tax				(1.0)	(1.0)
Comprehensive Income					(91.6)
Ending balance at Jan. 03, 2010	566.4	36.9	571.5	25.1		36.6	(106.6)	3.5	(0.6)
Conversion of capital stock
Sale of stock, exercise of stock options, restricted stock awards and other		(8.9)					36.3
Comprehensive income
Net earnings (loss)	26.1		26.1		26.1
Foreign currency translation adjustments, net of tax				3.6	3.9
Unrealized (losses) gains on investments, net of tax				1.0	1.0
Pension liability adjustments, net of tax				(0.7)	(0.8)
Reclassification adjustments included in net earnings					(0.2)
Comprehensive Income					30.0
Ending balance at Jan. 02, 2011	623.8	28.0	597.6	29.0		36.6	(70.3)	3.5	(0.6)
Conversion of capital stock
Sale of stock, exercise of stock options, restricted stock awards and other		0.8					4.0
Comprehensive income
Net earnings (loss)	63.7		63.7		63.7
Dividends			(3.8)
Foreign currency translation adjustments, net of tax				(9.6)	(8.0)
Unrealized (losses) gains on investments, net of tax				(2.1)	(2.1)
Pension liability adjustments, net of tax				(1.1)	(1.2)
Reclassification adjustments included in net earnings					(1.5)
Comprehensive Income					50.9
Ending balance at Jan. 01, 2012	$ 675.7	$ 28.8	$ 657.5	$ 16.2		$ 36.6	$ (66.3)	$ 3.5	$ (0.6)