Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 329,358	$ 352,896
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	312,645	278,889
Share-based compensation expense	49,139	39,359
Provision for deferred income taxes	1,736	25,849
Changes in assets and liabilities (net of businesses acquired):
Receivables, net	(186,039)	(79,723)
Inventory	390	211
Prepaid expenses and other	181,035	106
Accounts payable	43,364	33,647
Accrued income taxes	7,919	(3,846)
Deferred revenue	(40,132)	12,336
Other accrued liabilities	9,251	(63,896)
Net cash provided by operating activities	708,666	595,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(188,994)	(189,372)
Capitalized software development costs	(142,951)	(142,966)
Purchases of investments	(194,592)	(182,484)
Sales and maturities of investments	331,728	187,355
Purchase of other intangibles	(16,373)	(14,036)
Net cash used in investing activities	(211,182)	(341,503)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of Long-term Debt	(75,000)	0
Proceeds from exercise of options	21,343	38,293
Payments to taxing authorities in connection with shares directly withheld from associates	(7,308)	(7,972)
Treasury stock purchases	(287,624)	0
Contingent consideration payments for acquisition of businesses	(1,691)	(2,671)
Net cash provided by (used in) financing activities	(350,280)	27,650
Effect of exchange rate changes on cash and cash equivalents	(7,159)	7,594
Net increase (decrease) in cash and cash equivalents	140,045	289,569
Cash and cash equivalents at beginning of period	370,923	170,861
Cash and cash equivalents at end of period	$ 510,968	$ 460,430