Net Income per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 28, 2013		Sep. 29, 2012		Sep. 28, 2013		Sep. 29, 2012
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 96,779		$ 103,617		$ 264,589		$ 331,628
Weighted average shares outstanding - basic	100,750		108,301		103,269		110,245
Net effect of various dilutive stock-based compensation awards	919		1,593		1,157		1,851
Weighted average shares outstanding - diluted	101,669		109,894		104,426		112,096
Net income per share:
Basic	$ 0.96		$ 0.96		$ 2.56		$ 3.01
Diluted	$ 0.95	[1]	$ 0.94	[1]	$ 2.53	[1]	$ 2.96	[1]
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	831		1,789		871		1,403

[1] Stock-based compensation awards for the issuance of 831 and 871 shares for the third quarter and first nine months of 2013 and 1,789 and 1,403 shares for the third quarter and first nine months of 2012, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.