Product Warranty And Safety Recall Campaigns (Warranty And Safety Recall Liability) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Mar. 27, 2011
Product Warranty And Safety Recall Campaigns [Abstract]
Balance, beginning of period	$ 54,994	$ 54,134
Warranties issued during the period	14,912	11,225
Settlements made during the period	(13,958)	(10,296)
Recalls and changes to pre-existing warranty liabilities	1,154	2,048
Balance, end of period	$ 57,102	$ 57,111