Net Income per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 113,628	$ 136,309
Weighted average shares outstanding - basic	112,002	115,215
Net effect of various dilutive stock-based compensation awards	2,075	2,213
Weighted average shares outstanding - diluted	114,077	117,428
Net income per share:
Basic	$ 1.01	$ 1.18
Diluted	$ 1	$ 1.16
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	589	256