Business Segment Information (Schedule Of Reconciliation Of Segment Assets To Condensed Consolidated Total Assets) (Details) (USD $)										3 Months Ended
	Apr. 01, 2012	Dec. 31, 2011	Mar. 27, 2011	Apr. 01, 2012 Segment [Member]	Mar. 27, 2011 Segment [Member]	Apr. 01, 2012 Corporate Assets [Member]		Mar. 27, 2011 Corporate Assets [Member]		Mar. 27, 2011 Assets Of Businesses Divested [Member]		Apr. 01, 2012 Assets Held For Sale [Member]	Mar. 27, 2011 Assets Held For Sale [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 3,649,886,000	$ 3,924,103,000	$ 3,678,803,000	$ 2,848,940,000	$ 3,197,282,000	$ 792,920,000	[1]	$ 371,285,000	[1]	$ 101,873,000	[2]	$ 8,026,000	$ 8,363,000
Reclassification of previously reported assets held for sale										$ 31,800,000

[1] Increase in corporate assets from the prior period reflects higher cash balances as a result of sale of businesses at the end of 2011.

[2] Includes $31.8 million of assets previously reported as assets held for sale in 2011.