CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 1,012,142	$ 599,264
Short-term investments	525,667	560,992
Trade receivables	694,921	682,981
Inventories	1,737,264	1,848,735
Prepaid expenses	57,348	122,224
Total current assets	4,027,342	3,814,196
Long-term investments	6,790,916	6,016,438
Other noncurrent assets	463,824	515,265
Operating lease right-of-use assets	2,860,491	0
Property, plant and equipment	14,498,163	14,174,564
Accumulated depreciation	(5,670,436)	(5,537,947)
Net property, plant and equipment	8,827,727	8,636,617
Total assets	22,970,300	18,982,516
Current liabilities:
Accounts payable	1,901,726	1,864,604
Accrued expenses:
Contributions to retirement plans	273,697	540,760
Self-insurance reserves	146,387	145,241
Salaries and wages	191,926	132,916
Other	365,519	321,080
Current portion of long-term debt	5,010	4,954
Current portion of operating lease liabilities	327,399	0
Federal and state income taxes	119,441	0
Total current liabilities	3,331,105	3,009,555
Deferred income taxes	507,146	420,757
Self-insurance reserves	223,927	222,419
Accrued postretirement benefit cost	105,406	105,308
Long-term debt	161,639	162,711
Operating lease liabilities	2,535,134	0
Other noncurrent liabilities	109,203	67,102
Total liabilities	6,973,560	3,987,852
Common stock related to Employee Stock Ownership Plan (ESOP)	3,510,183	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	3,719,040	3,458,004
Retained earnings	11,635,790	10,840,654
Treasury stock at cost, 2,800 shares in 2019	(119,972)	0
Accumulated other comprehensive earnings (losses)	4,052	(55,762)
Common stock related to ESOP	(3,510,183)	(3,134,999)
Total stockholders’ equity	12,450,398	11,823,342
Noncontrolling interests	36,159	36,323
Total equity	15,996,740	14,994,664
Total liabilities and stockholders' equity	$ 22,970,300	$ 18,982,516