Consolidated Statements Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Common Stock (Acquired From) Sold To Stock-Holders [Member]	Accumulated Other Comprehensive Earnings (Losses) [Member]	Common Stock Related To ESOP [Member]	Total
Balances at Dec. 27, 2008	$ 793,966	$ 806,526	$ 4,055,432		$ (12,626)	$ (1,777,153)	$ 3,866,145
Comprehensive earnings			1,161,442		55,831		1,217,273
Cash dividends			(325,295)				(325,295)
Contribution of shares to retirement plans	3,522	31,594		206,589			241,705
Acquired shares from stockholders				(629,453)			(629,453)
Sale of shares to stockholders	7	(151)		152,240			152,096
Retirement of shares	(16,929)		(253,695)	270,624
Change for ESOP related shares						(85,197)	(85,197)
Balances at Dec. 26, 2009	780,566	837,969	4,637,884		43,205	(1,862,350)	4,437,274
Comprehensive earnings			1,338,147		(4,979)		1,333,168
Cash dividends			(364,087)				(364,087)
Contribution of shares to retirement plans	12,968	214,414		21,813			249,195
Acquired shares from stockholders				(436,224)			(436,224)
Sale of shares to stockholders	2,255	39,625		137,034			178,914
Retirement of shares	(14,820)		(262,557)	277,377
Change for ESOP related shares						(154,346)	(154,346)
Balances at Dec. 25, 2010	780,969	1,092,008	5,349,387		38,226	(2,016,696)	5,243,894
Comprehensive earnings			1,491,966		(7,965)		1,484,001
Cash dividends			(418,680)				(418,680)
Contribution of shares to retirement plans	10,064	202,761		48,599			261,424
Acquired shares from stockholders				(497,570)			(497,570)
Sale of shares to stockholders	2,920	60,112		143,213			206,245
Retirement of shares	(14,278)		(291,480)	305,758
Change for ESOP related shares						(120,521)	(120,521)
Balances at Dec. 31, 2011	$ 779,675	$ 1,354,881	$ 6,131,193		$ 30,261	$ (2,137,217)	$ 6,158,793

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e540-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph A5

-Appendix A

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 8, 9, 10, 11, 12, 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6508144

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e557-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

+ Details

- Definition

The cash outflow to reacquire common stock during the period.

+ References+ Details

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References+ Details

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References+ Details

- Definition

Aggregate value of stock issued during the period as a result of employee stock ownership plan (ESOP).

+ References+ Details

- Definition

Equity impact of the par value of shares of common and preferred stock retired from treasury during the period. This element is used only when Treasury Stock is accounted for under the cost versus the par value method.

+ References+ Details