Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 28, 2019
Revenues:
Revenue	$ 5,764,824	$ 5,505,788	$ 5,692,598
Costs and expenses:
Cost of Revenue	1,001,017	932,941	1,071,041
Sales and client service	2,636,205	2,582,615	2,675,337
Software development (Includes amortization of $261,798, $247,313 and $227,414, respectively)	835,995	749,007	737,136
General and administrative	520,667	491,586	520,598
Amortization of acquisition-related intangibles	62,664	55,595	87,817
Total costs and expenses	5,056,548	4,811,744	5,091,929
Gain on sale of businesses	0	220,523	0
Operating earnings	708,276	914,567	600,669
Other income, net	(8,816)	76,906	53,843
Earnings before income taxes	699,460	991,473	654,512
Income taxes	(143,864)	(211,385)	(125,058)
Net earnings	$ 555,596	$ 780,088	$ 529,454
Basic earnings per share	$ 1.86	$ 2.54	$ 1.66
Diluted earnings per share	$ 1.84	$ 2.52	$ 1.65
Basic weighted average shares outstanding	298,725	306,669	318,229
Diluted weighted average shares outstanding	301,273	309,136	321,235