CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Cash flows from operating activities:
Cash received from customers	$ 33,730,192	$ 28,478,388
Cash paid to employees and suppliers	(28,969,545)	(25,061,839)
Income taxes paid	(613,861)	(361,130)
Self-insured claims paid	(272,717)	(288,782)
Dividends and interest received	181,287	159,812
Other operating cash receipts	238,978	255,608
Other operating cash payments	(14,414)	(15,069)
Net cash provided by operating activities	4,279,920	3,166,988
Cash flows from investing activities:
Payment for capital expenditures	(894,319)	(885,386)
Proceeds from sale of property, plant and equipment	3,862	7,561
Payment for investments	(4,239,533)	(2,214,737)
Proceeds from sale and maturity of investments	2,238,071	1,813,477
Net cash used in investing activities	(2,891,919)	(1,279,085)
Cash flows from financing activities:
Payment for acquisition of common stock	(1,091,145)	(814,306)
Proceeds from sale of common stock	194,894	233,395
Dividends paid	(661,606)	(615,549)
Repayment of long-term debt	(8,600)	(7,427)
Other, net	17,872	10,730
Net cash used in financing activities	(1,548,585)	(1,193,157)
Net (decrease) increase in cash and cash equivalents	(160,584)	694,746
Cash and cash equivalents at beginning of period	763,382	599,264
Cash and cash equivalents at end of period	602,798	1,294,010
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	2,951,974	2,216,054
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	545,180	534,747
Increase in last-in, first out (LIFO) reserve	32,449	30,788
Retirement contributions paid or payable in common stock	308,387	295,407
Deferred income taxes	(6,772)	120,713
Loss on disposal and impairment of long-lived assets	90,686	5,775
Gain on investments	(460,674)	(446,852)
Net amortization of investments	36,077	33,102
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	(40,411)	(18,633)
Inventories	(133,183)	57,259
Other assets	100,693	47,293
Accounts payable and accrued expenses	773,652	264,323
Federal and state income taxes	73,103	27,863
Other liabilities	8,759	(851)
Total adjustments	1,327,946	950,934
Net cash provided by operating activities	$ 4,279,920	$ 3,166,988