CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 640,262	$ 337,400
Short-term investments	892,094	797,260
Trade receivables	622,868	519,137
Merchandise inventories	1,344,289	1,409,367
Deferred tax assets	64,076	57,834
Prepaid expenses	32,745	28,124
Total current assets	3,596,334	3,149,122
Long-term investments	4,732,562	4,235,846
Other noncurrent assets	205,127	202,636
Property, plant and equipment	8,017,353	8,979,469
Accumulated depreciation	(3,323,523)	(4,288,753)
Net property, plant and equipment	4,693,830	4,690,716
Total assets	13,227,853	12,278,320
Current liabilities:
Accounts payable	1,420,029	1,306,996
Accrued expenses:
Contribution to retirement plans	222,707	430,395
Self-insurance reserves	140,591	138,998
Salaries and wages	162,741	109,091
Dividends payable	274,621	0
Other	266,099	230,486
Current portion of long-term debt	19,110	5,018
Federal and state income taxes	224,078	0
Total current liabilities	2,729,976	2,220,984
Deferred tax liabilities	348,736	327,294
Self-insurance reserves	212,785	212,728
Accrued postretirement benefit cost	116,398	116,721
Long-term debt	138,483	153,454
Other noncurrent liabilities	117,900	118,321
Total liabilities	3,664,278	3,149,502
Common stock related to Employee Stock Ownership Plan (ESOP)	2,536,531	2,272,963
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued 786,507 shares in 2013 and 776,094 shares in 2012	786,507	776,094
Additional paid-in capital	1,860,864	1,627,258
Retained earnings	6,837,170	6,640,538
Treasury stock at cost, 1,661 shares in 2013	(38,529)	0
Accumulated other comprehensive earnings	71,158	38,289
Common stock related to ESOP	(2,536,531)	(2,272,963)
Total stockholders’ equity	6,980,639	6,809,216
Noncontrolling interests	46,405	46,639
Total equity	9,563,575	9,128,818
Total liabilities and stockholders' equity	$ 13,227,853	$ 12,278,320