Debt, Commitments And Contingencies (Narrative) (Detail) (USD $)	0 Months Ended	9 Months Ended		9 Months Ended			0 Months Ended	9 Months Ended												9 Months Ended				9 Months Ended		3 Months Ended
	Nov. 21, 2012	Sep. 27, 2013	Dec. 28, 2012	Sep. 27, 2013 Term Loan [Member]	Dec. 28, 2012 Term Loan [Member]	Nov. 21, 2012 Term Loan [Member]	Nov. 21, 2012 2012 Credit Facility [Member]	Sep. 27, 2013 2012 Credit Facility [Member]	Dec. 28, 2012 2012 Credit Facility [Member]	Sep. 27, 2013 2012 Credit Facility [Member] Minimum	Sep. 27, 2013 2012 Credit Facility [Member] Minimum Floating Per Annum Rate [Member]	Sep. 27, 2013 2012 Credit Facility [Member] Minimum Reserve-Adjusted Rate [Member]	Sep. 27, 2013 2012 Credit Facility [Member] Maximum	Sep. 27, 2013 2012 Credit Facility [Member] Maximum Floating Per Annum Rate [Member]	Sep. 27, 2013 2012 Credit Facility [Member] Maximum Reserve-Adjusted Rate [Member]	Sep. 27, 2013 Two Thousand Twelve Credit Facility & Two Thousand Thirteen Uncommitted Facility [Member]	Dec. 28, 2012 Two Thousand Twelve Credit Facility & Two Thousand Thirteen Uncommitted Facility [Member]	Sep. 27, 2013 Promissory Notes And Other Debt [Member]	Dec. 28, 2012 Promissory Notes And Other Debt [Member]	Sep. 27, 2013 Revolving Credit Facility [Member]	Dec. 28, 2012 Revolving Credit Facility [Member]	Sep. 27, 2013 Revolving Credit Facility [Member] 2012 Credit Facility [Member]	Nov. 21, 2012 Revolving Credit Facility [Member] 2012 Credit Facility [Member]	Sep. 27, 2013 Revolving Credit Facility [Member] 2012 Credit Facility [Member] Minimum	Sep. 27, 2013 Revolving Credit Facility [Member] 2012 Credit Facility [Member] Maximum	Sep. 27, 2013 Revolving Credit Facility [Member] Uncommitted Facility [Member]	Sep. 27, 2013 Revolving Credit Facility [Member] Uncommitted Facility [Member] Minimum	Sep. 27, 2013 Revolving Credit Facility [Member] Uncommitted Facility [Member] Maximum
Debt Instrument [Line Items]
Short-term Debt, Weighted Average Interest Rate																1.32%	1.96%
Line of Credit Facility, Non Current Portion, Interest Rate at Period End								1.70%	1.96%
Aggregate availability of revolving credit line						$ 700,000,000	$ 1,400,000,000																$ 700,000,000
Revolving loan facility term	5 years
Term loan facility term	5 years
Increase in available revolving credit line							300,000,000
number of uncommitted revolving loan facilities		2
Unsecured revolving credit facility, initiation date							Nov. 21, 2012
Line of credit facility uncommitted fee amount																										75,000,000
Credit facility interest rate in addition to specific base rates											0.00%	1.00%		1.00%	2.00%												0.90%	1.00%
Total debt		809,064,000	911,158,000	673,750,000	700,000,000													8,314,000	3,158,000	127,000,000	208,000,000	65,000,000				62,000,000
Non-current portion of long-term debt		703,862,000	873,066,000	638,800,000														100,000	100,000	65,000,000
Credit facility commitment fee, percentage																								0.15%	0.35%
Amortization of credit facility percentage year one				5.00%
Amortization of credit facility percentage year two				5.00%
Amortization of credit facility percentage year three				10.00%
Amortization of credit facility percentage year four				10.00%
Amortization of credit facility percentage year five				70.00%
Payment Of Borrowings Bearing Interest At A Fixed Rate								3
Covenant Ratio Increase upon acquisition								0.25
Unsecured revolving credit facility, expiration date				Nov. 21, 2017																Nov. 21, 2017
Minimum Interest Coverage Ratio										3.00
Leverage Ratio On Credit Facility													3
Ratio of total indebtedness to EBITDA		The 2012 Credit Facility contains various customary representations and warranties by the Company, which include customary use of materiality, material adverse effect and knowledge qualifiers. The 2012 Credit Facility also contains customary affirmative and negative covenants including, among other requirements, negative covenants that restrict the Company's ability to dispose of assets, create liens, incur indebtedness, repurchase stock, pay dividends, make acquisitions and make investments. Further, the 2012 Credit Facility contains financial covenants that require the maintenance of minimum interest coverage and maximum leverage ratios. Specifically, the Company must maintain as of the end of each fiscal quarter a ratio of (a) EBITDA (as defined in the 2012 Credit Facility) to (b) interest expenses for the most recently ended period of four fiscal quarters of not less than 3.00 to 1. The Company must also maintain, at the end of each fiscal quarter, a ratio of (x) total indebtedness to (y) EBITDA (as defined in the 2012 Credit Facility) for the most recently ended period of four fiscal quarters of not greater than 3 to 1; provided, that on the completion of a material acquisition, the Company may increase the ratio by 0.25 for the fiscal quarter during which such acquisition occurred and each of the three subsequent fiscal quarters.
Restrictive covenants		The Company was in compliance with these restrictive covenants as of the third quarter of fiscal 2013.
Unconditional purchase obligations		$ 109,600,000