Retirement Plans (Details) (USD $)	12 Months Ended
Dec. 31, 2011 months	Dec. 25, 2010	Dec. 26, 2009
Retirement Plans [Abstract]
Compensation expense (ESOP)	$ 267,099,000	$ 253,093,000	$ 234,336,000
Period during which the company is required to purchase the shares at fair value after distribution of the shares from the ESOP, months	15.0
Distributed shares subject to put option, fair value	116,824,000	114,815,000
ESOP, shares cost	2,020,393,000	1,901,881,000
Common stock related to ESOP	2,137,217,000	2,016,696,000
ESOP shares, fair value	4,917,283,000	4,887,626,000
Maximum contribution percentage of employees' eligible annual compensation	10.00%
Percentage of company match approved for eligible contributions	50.00%	50.00%	50.00%
Percentage of eligible wages for matching contributions	3.00%	3.00%	3.00%
Amount of maximum match per employee	750	750	750
Expense for 401(k) match	$ 24,141,000	$ 22,454,000	$ 21,774,000

Amount of maximum match per employee

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- Definition

Fair value of distributed ESOP shares subject to put option as of balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The cost of ESOP shares subject to put option as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Expense for 401k match

+ References

No definition available.

+ Details

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- Definition

Maximum contribution percentage of employees eligible annual compensation

+ References

No definition available.

+ Details

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- Definition

Percentage of company match approved for eligible contributions.

+ References

No definition available.

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- Definition

Percentage of eligible wages that company matched.

+ References

No definition available.

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- Definition

Period During Which The Company Is Required To Purchase The Shares At Fair Value After Distribution Of The Shares From The ESOP In Months

+ References

No definition available.

+ Details

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- Definition

The amount of plan compensation cost recognized during the period.

+ References

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-Subparagraph c

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

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- Definition

Fair value of the shares allocated that are subject to a repurchase obligation.

+ References

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-Subparagraph f

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

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- Definition

The carrying value (book value) of an entity's issued and outstanding stock which is not included within permanent equity in Stockholders Equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.27(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number D-98

-Paragraph 2

-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 SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph i

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 28

-Subparagraph a

-Article 5

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