Product Warranties (Narrative) (Details)	6 Months Ended
	Jul. 01, 2011
Product Warranties [Abstract]
Basic limited warranty except access products, minimum range in days	90
Basic limited warranty except access products, maximum range in years	5
Basic limited warranty for access products, minimum range in years	2
Basic limited warranty for access products, maximum range in years	6
Number of months of estimated warranty included in current liabilities	12
Number of months over which warranty liability is classified as a long-term liability	12