Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 29, 2019	Jun. 30, 2020	Jun. 29, 2019
Revenues	$ 1,330,349	$ 1,431,061	$ 2,742,090	$ 2,820,938
Costs and expenses:
Cost of Goods and Services Sold	211,963	268,673	466,379	521,877
Sales and client service	645,087	678,895	1,281,736	1,319,082
Software development (Includes amortization of $61,197 and $122,208 for the three and six months ended June 30, 2020, respectively; and $56,005 and $112,250 for the three and six months ended June 29, 2019, respectively)	178,955	181,047	364,275	361,408
General and administrative	134,332	149,788	274,184	245,984
Amortization of acquisition-related intangibles	13,114	21,541	30,242	43,526
Total costs and expenses	1,183,451	1,299,944	2,416,816	2,491,877
Operating earnings	146,898	131,117	325,274	329,061
Other income, net	24,632	23,006	30,227	31,438
Earnings before income taxes	171,530	154,123	355,501	360,499
Income taxes	(36,782)	(27,154)	(73,594)	(67,311)
Net earnings	$ 134,748	$ 126,969	$ 281,907	$ 293,188
Basic earnings per share	$ 0.44	$ 0.40	$ 0.92	$ 0.91
Diluted earnings per share	$ 0.44	$ 0.39	$ 0.91	$ 0.90
Basic weighted average shares outstanding	304,776	321,280	307,256	322,485
Diluted weighted average shares outstanding	306,717	324,662	309,520	325,498
Software development, amortization	$ 61,197	$ 56,005	$ 122,208	$ 112,250