CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 26, 2021	Dec. 26, 2020
Current assets:
Cash and cash equivalents	$ 903,810	$ 673,483
Short-term investments	678,075	682,965
Trade receivables	793,009	917,531
Inventories	1,922,097	2,033,792
Prepaid expenses	235,459	110,025
Total current assets	4,532,450	4,417,796
Long-term investments	12,080,627	10,605,234
Other noncurrent assets	437,955	415,103
Operating lease right-of-use assets	2,931,874	2,965,424
Property, plant and equipment	16,847,374	16,256,993
Accumulated depreciation	(6,847,159)	(6,566,473)
Net property, plant and equipment	10,000,215	9,690,520
Total assets	29,983,121	28,094,077
Current liabilities:
Accounts payable	2,299,558	2,414,798
Accrued expenses:
Contributions to retirement plans	428,511	639,581
Self-insurance reserves	173,795	161,223
Salaries and wages	310,756	197,721
Other	655,419	499,970
Current portion of long-term debt	40,846	36,392
Current portion of operating lease liabilities	351,353	345,805
Income taxes	35,399	71,354
Total current liabilities	4,295,637	4,366,844
Deferred income taxes	976,910	772,722
Self-insurance reserves	246,966	235,858
Accrued postretirement benefit cost	130,288	131,356
Long-term debt	113,368	123,835
Operating lease liabilities	2,551,728	2,588,258
Other noncurrent liabilities	498,391	589,340
Total liabilities	8,813,288	8,808,213
Common stock related to Employee Stock Ownership Plan (ESOP)	3,860,655	3,484,549
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued 695,725 shares in 2021 and 690,982 shares in 2020	695,725	690,982
Additional paid-in capital	4,291,484	4,005,969
Retained earnings	16,370,825	14,343,865
Treasury stock at cost, 5,511 shares in 2021	(335,022)	0
Accumulated other comprehensive earnings	104,223	200,951
Common stock related to ESOP	(3,860,655)	(3,484,549)
Total stockholders’ equity	17,266,580	15,757,218
Noncontrolling interests	42,598	44,097
Total equity	21,169,833	19,285,864
Total liabilities and stockholders' equity	$ 29,983,121	$ 28,094,077