CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020
Cash flows from operating activities:
Cash received from customers	$ 23,664,160	$ 22,659,014
Cash paid to employees and suppliers	(20,550,089)	(19,177,711)
Income taxes paid	(630,233)	(25,981)
Self-insured claims paid	(216,253)	(176,148)
Dividends and interest received	134,991	118,684
Other operating cash receipts	188,666	155,659
Other operating cash payments	(11,965)	(9,819)
Net cash provided by operating activities	2,579,277	3,543,698
Cash flows from investing activities:
Payment for capital expenditures	(649,922)	(574,003)
Proceeds from sale of property, plant and equipment	8,066	3,441
Payment for investments	(1,613,841)	(2,433,868)
Proceeds from sale and maturity of investments	850,818	1,195,829
Net cash used in investing activities	(1,404,879)	(1,808,601)
Cash flows from financing activities:
Payment for acquisition of common stock	(588,237)	(775,114)
Proceeds from sale of common stock	134,904	133,824
Dividends paid	(477,537)	(437,342)
Repayment of long-term debt	(12,057)	(5,617)
Other, net	(1,144)	9,263
Net cash used in financing activities	(944,071)	(1,074,986)
Net increase in cash and cash equivalents	230,327	660,111
Cash and cash equivalents at beginning of period	673,483	763,382
Cash and cash equivalents at end of period	903,810	1,423,493
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	2,504,497	2,034,390
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	389,090	359,268
Increase in last-in, first-out (LIFO) reserve	37,353	31,975
Retirement contributions paid or payable in common stock	213,300	201,713
Deferred income taxes	237,128	(12,856)
Loss on disposal and impairment of long-lived assets	10,443	80,888
Gain on investments	(928,355)	(242,440)
Net amortization of investments	38,517	21,566
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	124,522	11,525
Inventories	74,342	12,791
Other assets	7,125	6,153
Accounts payable and accrued expenses	23,103	511,455
Income taxes	(164,713)	523,158
Other liabilities	12,925	4,112
Total adjustments	74,780	1,509,308
Net cash provided by operating activities	$ 2,579,277	$ 3,543,698