Fair Value Measurements (Summary Of Assets And Liabilities Measured at Fair Value) (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011	Jun. 26, 2011
Fair Value Of Other Financial Instruments [Line Items]
Cash equivalents	$ 764,147	$ 1,302,367	$ 582,808
Marketable securities	135,848	153,380	244,555
Derivatives, assets	8,879	16,443
Total assets measured at fair value	908,874	1,472,190	827,363
Derivatives, liabilities	2,042	5,136	14,933
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value Of Other Financial Instruments [Line Items]
Cash equivalents	764,147	1,302,367	582,808
Marketable securities			49,999
Total assets measured at fair value	764,147	1,302,367	632,807
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Of Other Financial Instruments [Line Items]
Marketable securities	135,848	153,380	194,556
Derivatives, assets	8,879	16,443
Total assets measured at fair value	144,727	169,823	194,556
Derivatives, liabilities	2,042	5,136	14,933
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Of Other Financial Instruments [Line Items]
Cash equivalents
Marketable securities
Derivatives, assets
Total assets measured at fair value
Derivatives, liabilities