Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 01, 2011 Percent	Sep. 25, 2010 Percent	Oct. 01, 2011 Percent	Sep. 25, 2010 Percent
Income Taxes [Abstract]
Effective tax rate for the period (in hundredths)	33.00%	33.00%	33.00%	28.00%
Unrecognized Tax Benefits			$ 1.9
Effect of foreign tax rates lower than statutory tax rates and other foreign adjustments			0.6
Provision for state income taxes, net of the federal benefit			3.7
Unrecognized tax benefits estimated decrease in the next twelve months	3.8		3.8
Total unrecognized tax benefits including derecognized deferred tax assets	7.3		7.3
Unrecognized tax benefits accrued interest and penalties	0.3		0.3
Estimated impact on effective tax rate, if recognized	4.5		4.5
Statute of limitations open years for federal tax return and most state income tax returns			2008 and all subsequent years
U.S. production activities deduction			$ 3.0