Product Warranty And Safety Recall Campaigns (Warranty And Safety Recall Liability) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011	Sep. 26, 2010
Product Warranty And Safety Recall Campaigns [Abstract]
Balance, beginning of period	$ 55,407	$ 62,569	$ 54,134	$ 68,044
Warranties issued during the period	10,210	10,865	33,770	27,547
Settlements made during the period	(15,016)	(16,077)	(37,882)	(44,150)
Recalls and changes to pre-existing warranty liabilities	759	(903)	1,338	5,013
Balance, end of period	$ 51,360	$ 56,454	$ 51,360	$ 56,454