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Derivative financial instruments and fair value measurements (Notional Amounts) (Details)
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Sep. 28, 2013
lots
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|---|---|
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Cocoa [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 215 |
|
Future And Forward Purchase Contracts [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 684,000 |
|
Future And Forward Purchase Contracts [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 479,000 |
|
Future And Forward Sale Contracts [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (689,000) |
|
Future And Forward Sale Contracts [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (1,347,000) |
|
Future [Member] | Corn [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | (95,000) |
|
Future [Member] | Soybean [Member]
|
|
| Derivative [Line Items] | |
| Derivative, Nonmonetary Notional Amount | 330,000 |