Derivatives and Fair Value Measurements (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2016	Jun. 30, 2017
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Derivative Assets (Liabilities), at Fair Value, Ne	$ 0
Timing differences between the hedge settlement and the purchase transaction	Less than a day and up to a maximum of 30 days
Scenario, Forecast [Member] \| Foreign currency forward contract [Member]
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Net loss to be reclassified from accumulated other comprehensive loss to earnings over the next 12 months		$ 85,000,000
Scenario, Forecast [Member] \| Diesel fuel hedge contracts [Member]
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Net loss to be reclassified from accumulated other comprehensive loss to earnings over the next 12 months		$ 60,000,000

Timing differences between the hedge settlement and the purchase transaction.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

+ Details

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- References

No definition available.

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- Details

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