Discontinued Operations (Schedule Of Discontinued Operations - Key Components Of Income From Discontinued Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 0	$ 72,302,000	$ 9,900,000	$ 312,183,000
Operating expenses	0	(59,313,000)	(11,200,000)	(266,284,000)
Allocated interest expense	0	(399,000)	0	(1,614,000)
Earnings (loss) before income taxes	0	12,600,000	(1,300,000)	44,300,000
Income tax (expense) benefit	0	(4,570,000)	500,000	(16,168,000)
Earnings (loss) from discontinued operations	0	8,000,000	(800,000)	28,100,000
Gain on sale, net of $55 million and $126 million of related income taxes for the nine month periods ended September 28, 2012 and September 30, 2011, respectively	0	0	93,700,000	201,700,000
Earnings from discontinued operations, net of income taxes	0	8,020,000	92,858,000	229,817,000
Income taxes related to the gain on the sale			$ 55,000,000	$ 126,000,000