Net Income per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Oct. 01, 2011		Oct. 02, 2010		Oct. 01, 2011		Oct. 02, 2010
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 132,216		$ 118,502		$ 424,722		$ 321,741
Weighted average shares outstanding - basic	113,378		116,958		114,680		118,813
Net effect of various dilutive stock-based compensation awards	1,562		1,277		1,877		1,457
Weighted average shares outstanding - diluted	114,940		118,235		116,557		120,270
Net income per share:
Basic	$ 1.17		$ 1.01		$ 3.7		$ 2.71
Diluted	$ 1.15	[1]	$ 1	[1]	$ 3.64	[1]	$ 2.68	[1]
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,815		4,455		1,017		3,281

[1] (a)Stock-based compensation awards for the issuance of 1,815 and 1,017 shares for the third quarter and first nine months of 2011 and 4,455 and 3,281 shares for the third quarter and first nine months of 2010, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.