CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Cash flows from operating activities:
Cash received from customers	$ 18,151,097	$ 17,215,510
Cash paid to employees and suppliers	(15,831,134)	(15,167,169)
Income taxes paid	(531,571)	(466,410)
Self-insured claims paid	(184,068)	(174,570)
Dividends and interest received	93,307	125,108
Other operating cash receipts	143,692	133,035
Other operating cash payments	(7,862)	(9,554)
Net cash provided by operating activities	1,833,461	1,655,950
Cash flows from investing activities:
Payment for capital expenditures	(731,373)	(729,254)
Proceeds from sale of property, plant and equipment	7,990	3,238
Payment for investments	(1,138,033)	(1,838,942)
Proceeds from sale and maturity of investments	983,841	1,527,093
Net cash used in investing activities	(877,575)	(1,037,865)
Cash flows from financing activities:
Payment for acquisition of common stock	(750,771)	(594,244)
Proceeds from sale of common stock	154,275	149,677
Dividends paid	(359,252)	(346,132)
Repayment of long-term debt	(22,930)	(35,529)
Other, net	4,797	23,549
Net cash used in financing activities	(973,881)	(802,679)
Net decrease in cash and cash equivalents	(17,995)	(184,594)
Cash and cash equivalents at beginning of period	579,925	438,319
Cash and cash equivalents at end of period	561,930	253,725
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	1,296,443	1,050,343
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	328,381	317,674
Increase in last-in, first out (LIFO) reserve	15,224	13,513
Retirement contributions paid or payable in common stock	179,757	193,915
Deferred income taxes	11,508	42,979
Loss on disposal and impairment of property, plant and equipment	4,987	1,659
Gain on investments	(52,300)	(94,558)
Net amortization of investments	35,801	62,330
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	41,474	77,812
Inventories	62,240	(30,788)
Prepaid expenses and other noncurrent assets	(29,552)	(5,575)
Accounts payable and accrued expenses	158,441	57,257
Self-insurance reserves	6,361	6,186
Federal and state income taxes	(214,478)	(30,509)
Other noncurrent liabilities	(10,826)	(6,288)
Total adjustments	537,018	605,607
Net cash provided by operating activities	$ 1,833,461	$ 1,655,950