Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 147,159	$ 166,219
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	172,646	166,671
Share-based compensation expense	35,031	19,860
Provision for deferred income taxes	10,449	3,998
Investment gains	477	0
Changes in assets and liabilities:
Receivables, net	(22,774)	13,789
Inventory	(296)	928
Prepaid expenses and other	(13,681)	(13,318)
Accounts payable	8,539	(10,891)
Accrued income taxes	1,105	4,256
Deferred revenue	(42,310)	(61,547)
Other accrued liabilities	(11,885)	27,301
Net cash provided by operating activities	283,506	317,266
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(49,248)	(119,261)
Capitalized software development costs	(73,855)	(74,551)
Purchases of investments	(39,194)	(90,953)
Sales and maturities of investments	36,112	110,104
Purchase of other intangibles	(9,682)	(8,994)
Payments to Acquire Businesses, Net of Cash Acquired	744	0
Net cash used in investing activities	(136,611)	(183,655)
CASH FLOWS FROM FINANCING ACTIVITIES:
Long-term debt issuance	300,000	0
Proceeds from exercise of stock options	118,203	15,281
Payments to taxing authorities in connection with shares directly withheld from associates	(4,517)	(1,730)
Treasury stock purchases	(650,000)	(20,542)
Dividends paid	56,047	0
Other financing activities	(3,600)	0
Net cash used in financing activities	(295,961)	(6,991)
Effect of exchange rate changes on cash and cash equivalents	(7,365)	2,415
Net increase (decrease) in cash and cash equivalents	(156,431)	129,035
Cash and cash equivalents at beginning of period	441,843	374,126
Cash and cash equivalents at end of period	$ 285,412	$ 503,161