Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 119,526	$ 110,040
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	70,094	59,341
Share-based compensation expense	13,649	10,594
Provision for deferred income taxes	2,490	1,427
Changes in assets and liabilities (net of businesses acquired):
Receivables, net	24,844	71,944
Inventory	3,903	2,105
Prepaid expenses and other	(16,823)	(29,504)
Accounts payable	(29,531)	(11,183)
Accrued income taxes	(22,197)	4,922
Deferred revenue	22,279	2,960
Other accrued liabilities	(32,447)	(8,998)
Net cash provided by operating activities	155,787	213,648
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(69,661)	(49,451)
Capitalized software development costs	(44,544)	(34,334)
Purchases of investments	(256,027)	(312,845)
Sales and maturities of investments	235,948	296,239
Purchase of other intangibles	(3,301)	(23,307)
Acquisition of businesses, net of cash acquired	0	(67,802)
Net cash used in investing activities	(137,585)	(191,500)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt and capital lease obligations	(66)	(9,750)
Proceeds from excess tax benefits from share-based compensation	14,308	8,973
Proceeds from exercise of options	8,173	7,912
Treasury stock purchases	(75,026)	(63,241)
Contingent consideration payments for acquisition of businesses	0	(800)
Cash Grants	48,000	0
Other	2,894	475
Net cash provided by (used in) financing activities	(1,717)	(56,431)
Effect of exchange rate changes on cash and cash equivalents	1,066	(1,379)
Net increase (decrease) in cash and cash equivalents	17,551	(35,662)
Cash and cash equivalents at beginning of period	202,377	317,120
Cash and cash equivalents at end of period	219,928	281,458
Summary of acquisition transactions:
Fair value of net tangible assets acquired	0	2,381
Fair value of intangible assets acquired	0	25,489
Fair value of goodwill	0	59,567
Less: Fair value of contingent liability payable	0	(18,982)
Cash paid for acquisitions	0	68,455
Cash acquired	0	(653)
Net cash used	$ 0	$ 67,802