Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Statement of Stockholders' Equity [Abstract]
Balance, beginning of year			$ 1,996,069	$ 2,163,174
Comprehensive loss	(18,242)	(24,587)	(10,213)	(6,858)
Share-based compensation			8,330	13,756
Exercises of stock options			1,955	5,199
Dividends paid			(23,406)	(24,584)
Tax charge from share-based compensation			(676)	0
Repurchases of common stock for treasury			0	(152,681)
Other			(315)	(653)
Balance, end of period	$ 1,971,744	$ 1,997,353	$ 1,971,744	$ 1,997,353