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Derivative financial instruments and fair value measurements (Notional Amounts) (Details)
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Dec. 28, 2013
lots
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|---|---|
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Cocoa [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 168 |
|
Future And Forward Purchase Contracts [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 924,000 |
|
Future And Forward Purchase Contracts [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 1,030,000 |
|
Future And Forward Sale Contracts [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (639,000) |
|
Future And Forward Sale Contracts [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (1,625,000) |
|
Future [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (495,000) |
|
Future [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (45,000) |