Fair Value Measurements (Summary Of Assets And Liabilities Measured at Fair Value) (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013	Sep. 29, 2013
Balance [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 687,259	$ 836,387	$ 809,067
Investments, Fair Value Disclosure	90,306	129,181	145,511
Derivative Asset, Current	24,908	1,932	1,733
Assets, Fair Value Disclosure	802,473	967,500	956,311
Derivatives, liabilities	441	3,925	1,152
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	366,942	516,173	483,515
Investments, Fair Value Disclosure	32,727	30,172	23,277
Derivative Asset, Current	0	0	0
Assets, Fair Value Disclosure	399,669	546,345	506,792
Derivatives, liabilities	0	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	320,317	320,214	325,552
Investments, Fair Value Disclosure	57,579	99,009	122,234
Derivative Asset, Current	24,908	1,932	1,733
Assets, Fair Value Disclosure	402,804	421,155	449,519
Derivatives, liabilities	441	3,925	1,152
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0	0
Investments, Fair Value Disclosure	0	0	0
Derivative Asset, Current	0	0	0
Assets, Fair Value Disclosure	0	0	0
Derivatives, liabilities	$ 0	$ 0	$ 0