CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Cash flows from operating activities:
Cash received from customers	$ 9,698,829	$ 9,258,298
Cash paid to employees and suppliers	(8,317,811)	(7,945,490)
Income taxes refunded (paid)	1,152	(232,909)
Self-insured claims paid	(81,196)	(89,413)
Dividends and interest received	47,433	47,053
Other operating cash receipts	84,794	71,169
Other operating cash payments	(4,845)	(3,906)
Net cash provided by operating activities	1,428,356	1,104,802
Cash flows from investing activities:
Payment for capital expenditures	(254,836)	(449,980)
Proceeds from sale of property, plant and equipment	2,196	5,750
Payment for investments	(664,667)	(392,027)
Proceeds from sale and maturity of investments	310,379	310,943
Net cash used in investing activities	(606,928)	(525,314)
Cash flows from financing activities:
Payment for acquisition of common stock	(333,857)	(432,894)
Proceeds from sale of common stock	113,196	106,814
Dividends paid	(185,835)	(168,597)
Repayment of long-term debt	(2,263)	(21,687)
Other, net	209	1,306
Net cash used in financing activities	(408,550)	(515,058)
Net increase in cash and cash equivalents	412,878	64,430
Cash and cash equivalents at beginning of period	599,264	579,925
Cash and cash equivalents at end of period	1,012,142	644,355
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	980,971	680,271
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	174,049	160,170
Increase in last-in, first out (LIFO) reserve	10,230	7,664
Retirement contributions paid or payable in common stock	101,071	92,225
Deferred income taxes	65,997	(6,434)
(Gain) loss on disposal and impairment of property, plant and equipment	(1,146)	724
(Gain) loss on investments	(325,171)	24,955
Net amortization of investments	12,280	18,917
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	(12,718)	(75,403)
Inventories	101,241	65,914
Other assets	81,108	(30,468)
Accounts payable and accrued expenses	133,002	212,173
Federal and state income taxes	192,131	(49,372)
Other liabilities	(84,689)	3,466
Total adjustments	447,385	424,531
Net cash provided by operating activities	$ 1,428,356	$ 1,104,802