Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Cash flows from operating activities:
Cash received from customers	$ 27,579,893	$ 26,980,492	$ 25,209,753
Cash paid to employees and suppliers	(24,279,245)	(24,024,194)	(22,253,046)
Income taxes paid	(785,147)	(658,213)	(686,037)
Self-insured claims paid	(293,359)	(285,362)	(274,305)
Dividends and interest received	182,025	139,727	95,794
Other operating cash receipts	214,022	203,112	184,760
Other operating cash payments	(13,982)	(14,375)	(10,951)
Net cash provided by operating activities	2,604,207	2,341,187	2,265,968
Cash flows from investing activities:
Payment for capital expenditures	(697,112)	(602,952)	(468,530)
Proceeds from sale of property, plant and equipment	5,503	5,312	2,815
Payment for investments	(1,882,223)	(2,062,775)	(1,598,759)
Proceeds from sale and maturity of investments	1,010,277	841,028	655,799
Net cash used in investing activities	(1,563,555)	(1,819,387)	(1,408,675)
Cash flows from financing activities:
Payment for acquisition of common stock	(551,816)	(497,570)	(436,224)
Proceeds from sale of common stock	197,448	206,245	178,914
Dividends paid	(698,652)	(418,680)	(364,087)
Repayments of long-term debt	(18,277)	(49,076)	(10,875)
Other, net	1,192	(1,767)	10,364
Net cash used in financing activities	(1,070,105)	(760,848)	(621,908)
Net (decrease) increase in cash and cash equivalents	(29,453)	(239,048)	235,385
Cash and cash equivalents at beginning of year	366,853	605,901	370,516
Cash and cash equivalents at end of year	337,400	366,853	605,901
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	1,552,255	1,491,966	1,338,147
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	493,239	492,639	507,341
Increase in LIFO reserve	28,419	67,145	14,124
Retirement contributions paid or payable in common stock	304,285	291,240	275,547
Deferred income taxes	7,002	95,848	20,722
Loss on disposal and impairment of property, plant and equipment	24,855	13,734	19,896
Gain on AFS securities	(10,386)	(19,886)	(24,516)
Net amortization of investments	108,300	80,890	48,113
Change in operating assets and liabilities providing (requiring) cash:
Trade receivables	22,517	(50,782)	16,165
Merchandise inventories	(76,077)	(70,277)	12,121
Prepaid expenses and other noncurrent assets	(3,374)	(15,635)	(8,054)
Accounts payable and accrued expenses	181,916	(51,741)	63,852
Self-insurance reserves	6,497	9,762	(13,494)
Federal and state income taxes	(41,153)	15,763	(5,113)
Other noncurrent liabilities	5,912	(9,479)	1,117
Total adjustments	1,051,952	849,221	927,821
Net cash provided by operating activities	$ 2,604,207	$ 2,341,187	$ 2,265,968