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Derivatives (Outstanding Contracts Designated as Cash Flow Hedges) (Details) - Designated as Hedging Instrument [Member] lb in Millions, MXN in Millions, CAD in Millions | Jun. 30, 2017 CAD lb | Jun. 30, 2017 MXN lb | Dec. 31, 2016 CAD lb | Dec. 31, 2016 MXN lb
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Commodity Futures Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, nonmonetary notional amount (in lbs) | lb | 21.5 | 21.5 | 30.4 | 30.4
Foreign Exchange Forward [Member] | Mexican Peso [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | MXN |  | MXN 146.7 |  | MXN 310.1
Foreign Exchange Forward [Member] | Canadian Dollar [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount | CAD | CAD 0.0 |  | CAD 24.9 |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + 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 + Details
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- 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 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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