Net Income per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 29, 2012		Oct. 01, 2011		Sep. 29, 2012		Oct. 01, 2011
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 103,617		$ 132,216		$ 331,628		$ 424,722
Average shares outstanding - basic	108,301		113,378		110,245		114,680
Net effect of various dilutive stock-based compensation awards	1,593		1,562		1,851		1,877
Average shares outstanding - diluted	109,894		114,940		112,096		116,557
Net income per share:
Basic	$ 0.96		$ 1.17		$ 3.01		$ 3.70
Diluted	$ 0.94	[1]	$ 1.15	[1]	$ 2.96	[1]	$ 3.64	[1]
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,789		1,815		1,403		1,017

[1] (a)Stock-based compensation awards for the issuance of 1,789 and 1,403 shares for the third quarter and first nine months of 2012 and 1,815 and 1,017 shares for the third quarter and first nine months of 2011, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.