CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 29, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 820,610	$ 599,264
Short-term investments	443,636	560,992
Trade receivables	680,737	682,981
Inventories	1,780,464	1,848,735
Prepaid expenses	81,196	122,224
Total current assets	3,806,643	3,814,196
Long-term investments	7,214,453	6,016,438
Other noncurrent assets	459,494	515,265
Operating lease right-of-use assets	2,852,599	0
Property, plant and equipment	14,862,041	14,174,564
Accumulated depreciation	(5,811,601)	(5,537,947)
Net property, plant and equipment	9,050,440	8,636,617
Total assets	23,383,629	18,982,516
Current liabilities:
Accounts payable	1,873,569	1,864,604
Accrued expenses:
Contributions to retirement plans	372,762	540,760
Self-insurance reserves	151,162	145,241
Salaries and wages	247,055	132,916
Other	383,915	321,080
Current portion of long-term debt	5,071	4,954
Current portion of operating lease liabilities	327,735	0
Federal and state income taxes	15,217	0
Total current liabilities	3,376,486	3,009,555
Deferred income taxes	568,217	420,757
Self-insurance reserves	223,607	222,419
Accrued postretirement benefit cost	105,492	105,308
Long-term debt	166,926	162,711
Operating lease liabilities	2,520,256	0
Other noncurrent liabilities	136,791	67,102
Total liabilities	7,097,775	3,987,852
Common stock related to Employee Stock Ownership Plan (ESOP)	3,350,623	3,134,999
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued 721,671 shares in 2019 and 715,445 shares in 2018	721,671	715,445
Additional paid-in capital	3,719,046	3,458,004
Retained earnings	12,081,295	10,840,654
Treasury stock at cost, 7,686 shares in 2019	(336,547)	0
Accumulated other comprehensive earnings (losses)	62,219	(55,762)
Common stock related to ESOP	(3,350,623)	(3,134,999)
Total stockholders’ equity	12,897,061	11,823,342
Noncontrolling interests	38,170	36,323
Total equity	16,285,854	14,994,664
Total liabilities and stockholders' equity	$ 23,383,629	$ 18,982,516