Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 166,219	$ 160,001
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	166,671	152,592
Share-based compensation expense	19,860	24,935
Provision for deferred income taxes	3,998	(3,047)
Changes in assets and liabilities:
Receivables, net	13,789	(70,608)
Inventory	928	1,445
Prepaid expenses and other	(13,318)	125,550
Accounts payable	(10,891)	7,608
Accrued income taxes	4,256	7,195
Deferred revenue	(61,547)	(7,205)
Other accrued liabilities	27,301	10,499
Net cash provided by operating activities	317,266	408,965
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(119,261)	(79,711)
Capitalized software development costs	(74,551)	(73,602)
Purchases of investments	(90,953)	(151,387)
Sales and maturities of investments	110,104	101,674
Purchase of other intangibles	(8,994)	(8,472)
Net cash used in investing activities	(183,655)	(211,498)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt	0	(75,000)
Proceeds from exercise of stock options	15,281	10,036
Payments to taxing authorities in connection with shares directly withheld from associates	(1,730)	(1,723)
Treasury stock purchases	(20,542)	(87,624)
Net cash used in financing activities	(6,991)	(154,311)
Effect of exchange rate changes on cash and cash equivalents	2,415	(680)
Net increase in cash and cash equivalents	129,035	42,476
Cash and cash equivalents at beginning of period	374,126	370,923
Cash and cash equivalents at end of period	$ 503,161	$ 413,399