Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 397,232	$ 306,627	$ 237,272
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	222,580	212,556	193,337
Share-based compensation expense	36,113	27,919	23,723
Provision for deferred income taxes	8,342	(22,113)	30,362
Changes in assets and liabilities (net of businesses acquired):
Receivables, net	(83,705)	(128,979)	(17,370)
Inventory	(279)	(12,329)	188
Prepaid expenses and other	(2,224)	9,974	35,378
Accounts payable	35,265	17,504	30,812
Accrued income taxes	(22,784)	26,053	(42,651)
Deferred revenue	33,277	33,792	(24,618)
Other accrued liabilities	84,497	75,290	(9,989)
Net cash provided by operating activities	708,314	546,294	456,444
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(183,429)	(104,795)	(102,311)
Capitalized software development costs	(100,189)	(82,942)	(80,979)
Purchases of investments	(1,286,997)	(1,083,274)	(803,832)
Sales and maturities of investments	932,394	791,881	491,492
Purchase of other intangibles	(22,870)	(20,620)	(10,780)
Acquisition of businesses, net of cash acquired	(40,540)	(65,341)	(14,486)
Net cash used in investing activities	(701,631)	(565,091)	(520,896)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt and capital lease obligations	(17,083)	(25,701)	(27,625)
Proceeds from excess tax benefits from share-based compensation	48,370	36,433	26,226
Proceeds from exercise of options	38,147	38,900	34,724
Contingent consideration payments for acquisition of business	(3,400)	(779)	0
Proceeds from sale of future receivables	0	0	1,516
Net cash provided by financing activities	66,034	48,853	34,841
Effect of exchange rate changes on cash and cash equivalents	1,257	(1,421)	2,399
Net increase (decrease) in cash and cash equivalents	73,974	28,635	(27,212)
Cash and cash equivalents at beginning of period	243,146	214,511	241,723
Cash and cash equivalents at end of period	317,120	243,146	214,511
Cash paid during the year for:
Interest	6,448	5,786	6,887
Income taxes, net of refund	158,871	115,867	121,737
Summary of acquisition transactions:
Fair value of net tangible assets (liabilities) acquired (assumed)	(6,375)	(8,464)	1,069
Fair value of intangible assets acquired	18,559	32,264	5,076
Fair value of goodwill	35,281	50,751	11,290
Less: Fair value of contingent liability payable	(1,916)	(5,235)	(1,725)
Less: Fair value of working capital settlement payable	0	(939)	0
Cash paid for acquisitions	45,549	68,377	15,710
Cash acquired	(5,009)	(3,036)	(1,224)
Net cash used	$ 40,540	$ 65,341	$ 14,486