Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash flows from operating activities:
Cash received from customers	$ 28,942,460	$ 27,579,893	$ 26,980,492
Cash paid to employees and suppliers	(25,673,800)	(24,279,245)	(24,024,194)
Income taxes paid	(789,721)	(785,147)	(658,213)
Self-insured claims paid	(321,060)	(293,359)	(285,362)
Dividends and interest received	205,923	182,025	139,727
Other operating cash receipts	222,178	214,022	203,112
Other operating cash payments	(18,677)	(13,982)	(14,375)
Net cash provided by operating activities	2,567,303	2,604,207	2,341,187
Cash flows from investing activities:
Payment for capital expenditures	(668,485)	(697,112)	(602,952)
Proceeds from sale of property, plant and equipment	21,360	5,503	5,312
Payment for investments	(2,442,298)	(1,882,223)	(2,062,775)
Proceeds from sale and maturity of investments	1,367,922	1,010,277	841,028
Net cash used in investing activities	(1,721,501)	(1,563,555)	(1,819,387)
Cash flows from financing activities:
Payment for acquisition of common stock	(563,470)	(551,816)	(497,570)
Proceeds from sale of common stock	242,211	197,448	206,245
Dividends paid	(547,287)	(698,652)	(418,680)
Repayments of long-term debt	(16,803)	(18,277)	(49,076)
Other, net	4,015	1,192	(1,767)
Net cash used in financing activities	(881,334)	(1,070,105)	(760,848)
Net decrease in cash and cash equivalents	(35,532)	(29,453)	(239,048)
Cash and cash equivalents at beginning of year	337,400	366,853	605,901
Cash and cash equivalents at end of year	301,868	337,400	366,853
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	1,653,954	1,552,255	1,491,966
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	501,689	493,239	492,639
Increase in LIFO reserve	14,787	28,419	67,145
Retirement contributions paid or payable in common stock	319,175	304,285	291,240
Deferred income taxes	1,061	7,002	95,848
Loss on disposal and impairment of property, plant and equipment	26,065	24,855	13,734
Gain on AFS securities	(47,769)	(10,386)	(19,886)
Net amortization of investments	133,422	108,300	80,890
Change in operating assets and liabilities providing (requiring) cash:
Trade receivables	(21,086)	22,517	(50,782)
Merchandise inventories	(112,397)	(76,077)	(70,277)
Prepaid expenses and other noncurrent assets	(1,757)	(3,374)	(15,635)
Accounts payable and accrued expenses	76,083	181,916	(51,741)
Self-insurance reserves	4,315	6,497	9,762
Federal and state income taxes	21,844	(41,153)	15,763
Other noncurrent liabilities	(2,083)	5,912	(9,479)
Total adjustments	913,349	1,051,952	849,221
Net cash provided by operating activities	$ 2,567,303	$ 2,604,207	$ 2,341,187