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Derivative Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jul. 13, 2013	Jul. 13, 2013 Cash Flow Hedging	Jul. 13, 2013 Other Current Assets	Dec. 29, 2012 Other Current Assets	Jul. 13, 2013 Interest Rate Contracts ButterKrust	Jul. 13, 2013 Interest Rate Contracts Cash Flow Hedging	Jul. 13, 2013 Interest Rate Contracts Cash Flow Hedging ButterKrust	Aug. 01, 2008 Interest Rate Contracts Cash Flow Hedging ButterKrust	Aug. 01, 2008 Interest Rate Contracts Cash Flow Hedging Holsum
Derivative Instruments, Gain (Loss) [Line Items]
Commodity derivatives fair value, net	$ (13.2)
Cash settlement on hedge	3.1
Notional amount of interest rate swap		197.8			9.6	9.6	9.6	85.0	65.0
Term loan outstanding	150.0
Fair value of interest rate swaps	(0.1)
Derivative instrument, asset			$ 21.7	$ 9.0

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

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- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959



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-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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- Definition

Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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- Definition

Fair value as of the balance sheet date of all price risk derivatives designated as cash flow hedging instruments.

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- Definition

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

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