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Effect of Derivative Instruments Located on the Condensed Consolidated Statements of Income, Utilized for Risk Management Purposes (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) | $ (24,457) |  | $ (1,546) |  | $ (17,851) |
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | 17,141 |  | 12,354 |  | (20,962) |
Interest Rate Contracts |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) | (205) |  | (1,221) |  | (547) |
Interest Rate Contracts | Interest Expense (Income) |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | 502 |  | 1,732 |  | 2,431 |
Commodity Contract |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) | (24,252) |  | (325) |  | (17,304) |
Commodity Contract | Production Costs |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | $ 16,639 | [1] | $ 10,622 | [1] | $ (23,393) | [1]
[1] | Included in Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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