CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash flows from operating activities:
Cash received from customers	$ 9,258,298	$ 8,736,477
Cash paid to employees and suppliers	(7,945,490)	(7,604,800)
Income taxes paid	(232,909)	(9,576)
Self-insured claims paid	(89,413)	(82,262)
Dividends and interest received	47,053	59,759
Other operating cash receipts	71,169	66,493
Other operating cash payments	(3,906)	(4,565)
Net cash provided by operating activities	1,104,802	1,161,526
Cash flows from investing activities:
Payment for capital expenditures	(449,980)	(287,654)
Proceeds from sale of property, plant and equipment	5,750	536
Payment for investments	(392,027)	(861,677)
Proceeds from sale and maturity of investments	310,943	471,840
Net cash used in investing activities	(525,314)	(676,955)
Cash flows from financing activities:
Payment for acquisition of common stock	(432,894)	(287,451)
Proceeds from sale of common stock	106,814	107,743
Dividends paid	(168,597)	(169,722)
Repayment of long-term debt	(21,687)	(8,616)
Other, net	1,306	3,788
Net cash used in financing activities	(515,058)	(354,258)
Net increase in cash and cash equivalents	64,430	130,313
Cash and cash equivalents at beginning of period	579,925	438,319
Cash and cash equivalents at end of period	644,355	568,632
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	680,271	555,271
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	160,170	157,291
Increase in last-in, first out (LIFO) reserve	7,664	4,582
Retirement contributions paid or payable in common stock	92,225	102,337
Deferred income taxes	(6,434)	8,377
Loss on disposal and impairment of property, plant and equipment	724	1,780
Loss (gain) on investments	24,955	(31,269)
Net amortization of investments	18,917	32,234
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	(75,403)	49,885
Inventories	65,914	(18,051)
Prepaid expenses and other noncurrent assets	(30,468)	(9,494)
Accounts payable and accrued expenses	212,173	68,633
Self-insurance reserves	3,383	2,268
Federal and state income taxes	(49,372)	236,741
Other noncurrent liabilities	83	941
Total adjustments	424,531	606,255
Net cash provided by operating activities	$ 1,104,802	$ 1,161,526