Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 28, 2019	Dec. 29, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 780,088	$ 529,454	$ 630,059
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	697,423	687,966	642,591
Share-based compensation expense	153,449	103,641	95,423
Provision for deferred income taxes	1,502	51,125	34,428
Gain on sale of businesses	(220,523)	0	0
Investment gains	(75,834)	(29,621)	0
Changes in assets and liabilities (net of businesses acquired):
Receivables, net	3,686	58,113	(207,785)
Inventory	960	1,855	(9,307)
Prepaid expenses and other	(51,442)	(76,748)	156,216
Accounts payable	(62,663)	(8,734)	65,202
Accrued income taxes	19,995	(4,599)	(27,849)
Deferred revenue	34,500	(39,245)	81,538
Other accrued liabilities	155,564	39,892	(6,507)
Net cash provided by operating activities	1,436,705	1,313,099	1,454,009
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(283,981)	(471,518)	(446,928)
Capitalized software development costs	(295,277)	(273,871)	(273,693)
Purchases of investments	(696,548)	(364,648)	(623,293)
Sales and maturities of investments	333,161	579,755	551,796
Purchase of other intangibles	(38,243)	(35,587)	(36,819)
Sale of businesses	229,471	0	0
Acquisition of business, net of cash acquired	(49,820)	(74,539)	0
Net cash used in investing activities	(801,237)	(640,408)	(828,937)
CASH FLOWS FROM FINANCING ACTIVITIES:
Long-term debt issuance	300,000	600,000	0
Repayment of long-term debt	(2,500)	0	(75,000)
Proceeds from exercise of options	253,605	258,036	91,349
Payments to taxing authorities in connection with shares directly withheld from associates	(23,672)	(16,601)	(9,873)
Treasury stock purchases	(756,950)	(1,320,542)	(623,127)
Dividends paid	(221,461)	(113,823)	0
Other	(10,519)	(8,450)	6,864
Net cash used in financing activities	(461,497)	(601,380)	(609,787)
Effect of exchange rate changes on cash and cash equivalents	(199)	(3,594)	(12,082)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	173,772	67,717	3,203
Cash and cash equivalents at beginning of period	441,843	374,126	370,923
Cash and cash equivalents at end of period	$ 615,615	$ 441,843	$ 374,126