Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 763,382	$ 599,264
Short-term investments	438,105	560,992
Trade receivables	737,093	682,981
Inventories	1,913,310	1,848,735
Prepaid expenses	75,710	122,224
Total current assets	3,927,600	3,814,196
Long-term investments	7,988,280	6,016,438
Other noncurrent assets	441,938	515,265
Operating lease right-of-use assets	2,964,780	0
Property, plant and equipment:
Land	1,984,400	1,850,718
Buildings and improvements	5,948,039	5,535,538
Furniture, fixtures and equipment	5,477,534	5,114,698
Leasehold improvements	1,660,164	1,564,243
Construction in progress	152,272	109,367
Property, plant and equipment	15,222,409	14,174,564
Accumulated depreciation	(6,037,887)	(5,537,947)
Net property, plant and equipment	9,184,522	8,636,617
Total assets	24,507,120	18,982,516
Current liabilities:
Accounts payable	1,984,761	1,864,604
Accrued expenses:
Contributions to retirement plans	581,699	540,760
Self-insurance reserves	149,082	145,241
Salaries and wages	148,662	132,916
Other	461,427	321,080
Current portion of long-term debt	39,692	4,954
Current portion of operating lease liabilities	335,391	0
Total current liabilities	3,700,714	3,009,555
Deferred income taxes	682,484	420,757
Self-insurance reserves	226,727	222,419
Accrued postretirement benefit cost	120,015	105,308
Long-term debt	131,997	162,711
Operating lease liabilities	2,603,206	0
Other noncurrent liabilities	140,633	67,102
Total liabilities	7,605,776	3,987,852
Common stock related to Employee Stock Ownership Plan (ESOP)	3,259,230	3,134,999
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued and outstanding 706,552 shares in 2019 and 715,445 shares in 2018	706,552	715,445
Additional paid-in capital	3,758,066	3,458,004
Retained earnings	12,317,478	10,840,654
Accumulated other comprehensive earnings (losses)	81,289	(55,762)
Common stock related to ESOP	(3,259,230)	(3,134,999)
Total stockholders’ equity	13,604,155	11,823,342
Noncontrolling interests	37,959	36,323
Total equity	16,901,344	14,994,664
Commitments and contingencies	0	0
Total liabilities and stockholders' equity	$ 24,507,120	$ 18,982,516