CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 424,010	$ 366,853
Short-term investments	735,018	447,972
Trade receivables	502,235	542,990
Merchandise inventories	1,363,262	1,361,709
Deferred tax assets	66,635	59,400
Prepaid expenses	37,722	24,316
Total current assets	3,128,882	2,803,240
Long-term investments	4,288,345	3,805,283
Other noncurrent assets	202,320	171,179
Property, plant and equipment	8,821,065	8,621,316
Accumulated depreciation	(4,225,919)	(4,132,786)
Net property, plant and equipment	4,595,146	4,488,530
Assets, Total	12,214,693	11,268,232
Current liabilities:
Accounts payable	1,218,571	1,133,120
Accrued expenses:
Contribution to retirement plans	349,965	405,818
Self-insurance reserves	125,980	125,569
Salaries and wages	213,647	110,207
Other	318,241	221,713
Current portion of long-term debt	43,731	15,124
Federal and state income taxes		39,225
Total current liabilities	2,270,135	2,050,776
Deferred tax liabilities	317,075	316,802
Self-insurance reserves	224,513	219,660
Accrued postretirement benefit cost	104,282	103,595
Long-term debt	92,216	119,460
Other noncurrent liabilities	115,838	116,482
Total liabilities	3,124,059	2,926,775
Common stock related to Employee Stock Ownership Plan (ESOP)	2,294,158	2,137,217
Stockholders' equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued and outstanding 791,965 shares in 2012 and 779,675 shares in 2011	791,965	779,675
Additional paid-in capital	1,622,866	1,354,881
Retained earnings	6,826,035	6,131,193
Treasury stock at cost, 11,284 shares in 2012	(252,807)
Accumulated other comprehensive earnings	55,909	30,261
Common stock related to ESOP	(2,294,158)	(2,137,217)
Total stockholders' equity	6,749,810	6,158,793
Noncontrolling interests	46,666	45,447
Total equity	9,090,634	8,341,457
Liabilities and stockholders' equity, total	$ 12,214,693	$ 11,268,232