CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 602,798	$ 763,382
Short-term investments	650,446	438,105
Trade receivables	777,504	737,093
Inventories	2,014,044	1,913,310
Prepaid expenses	72,901	75,710
Total current assets	4,117,693	3,927,600
Long-term investments	10,165,781	7,988,280
Other noncurrent assets	437,401	441,938
Operating lease right-of-use assets	3,011,550	2,964,780
Property, plant and equipment	15,988,780	15,222,409
Accumulated depreciation	(6,527,003)	(6,037,887)
Net property, plant and equipment	9,461,777	9,184,522
Total assets	27,194,202	24,507,120
Current liabilities:
Accounts payable	2,138,485	1,984,761
Accrued expenses:
Contributions to retirement plans	523,308	581,699
Self-insurance reserves	155,561	149,082
Salaries and wages	351,945	148,662
Other	791,062	461,427
Current portion of long-term debt	39,614	39,692
Current portion of operating lease liabilities	344,186	335,391
Federal and state income taxes	47,459	0
Total current liabilities	4,391,620	3,700,714
Deferred income taxes	717,574	682,484
Self-insurance reserves	234,166	226,727
Accrued postretirement benefit cost	119,385	120,015
Long-term debt	138,879	131,997
Operating lease liabilities	2,628,156	2,603,206
Other noncurrent liabilities	177,993	140,633
Total liabilities	8,407,773	7,605,776
Common stock related to Employee Stock Ownership Plan (ESOP)	3,514,400	3,259,230
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued 711,636 shares in 2020 and 706,552 shares in 2019	711,636	706,552
Additional paid-in capital	4,005,969	3,758,066
Retained earnings	14,607,846	12,317,478
Treasury stock at cost, 15,529 shares in 2020	(787,483)	0
Accumulated other comprehensive earnings	204,084	81,289
Common stock related to ESOP	(3,514,400)	(3,259,230)
Total stockholders’ equity	15,227,652	13,604,155
Noncontrolling interests	44,377	37,959
Total equity	18,786,429	16,901,344
Total liabilities and stockholders' equity	$ 27,194,202	$ 24,507,120