Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 28, 2019	Sep. 30, 2020	Sep. 28, 2019
Revenues	$ 1,368,673	$ 1,429,428	$ 4,110,763	$ 4,250,366
Costs and expenses:
Costs of revenue	231,889	271,778	698,268	793,655
Sales and client service	625,402	707,743	1,907,138	2,026,825
Software development (Includes amortization of $61,578 and $183,786 for the three and nine months ended September 30, 2020, respectively; and $56,786 and $169,036 for the three and nine months ended September 28, 2019, respectively)	186,826	187,526	551,101	548,934
General and administrative	116,816	152,321	391,000	398,305
Amortization of acquisition-related intangibles	12,789	21,283	43,031	64,809
Total costs and expenses	1,173,722	1,340,651	3,590,538	3,832,528
Gain on sale of businesses	216,869	0	216,869	0
Operating earnings	411,820	88,777	737,094	417,838
Other income, net	48,020	13,535	78,247	44,973
Earnings before income taxes	459,840	102,312	815,341	462,811
Income taxes	(103,164)	(20,377)	(176,758)	(87,688)
Net earnings	$ 356,676	$ 81,935	$ 638,583	$ 375,123
Basic earnings per share	$ 1.17	$ 0.26	$ 2.08	$ 1.17
Diluted earnings per share	$ 1.16	$ 0.26	$ 2.07	$ 1.16
Basic weighted average shares outstanding	305,759	315,876	306,759	320,282
Diluted weighted average shares outstanding	308,366	319,113	309,124	323,361
Software development, amortization	$ 61,578	$ 56,786	$ 183,786	$ 169,036