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Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended	21 Months Ended	33 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 case	Sep. 30, 2014	Oct. 09, 2014 item	Dec. 31, 2013
Loss contingency
Accrued liability for the outcomes of non-income based tax audits	$ 7.8	$ 7.8	$ 7.8		$ 16.1
Litigation and Claims
Number of heavy equipment statutes cases tried and completed in Texas state district court		3
Number of district court rulings for which oral arguments were made				2
Ad valorem tax benefit	8.8		23.6
Ad valorem tax benefit agreed to by a number of appraisal review boards and county appraisal districts	6.2	6.2	6.2
Ad valorem tax benefit in litigation	17.4	17.4	17.4
Maximum
Business acquisition, contingent consideration
Contingent payments	$ 46	$ 46	$ 46

X

- Definition

The amount of ad valorem tax expense (benefit) included as a component of cost of goods sold (excluding depreciation and amortization).

+ References

No definition available.

+ Details

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- Definition

The amount of ad valorem tax expense (benefit) agreed to by one or more appraisal review boards and/or county appraisal districts.

+ References

No definition available.

+ Details

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X

- Definition

The amount of ad valorem tax expense (benefit) in litigation in various courts.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of district court rulings for which oral arguments were made.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of heavy equipment statutes cases tried and completed to which the entity is a party.

+ References

No definition available.

+ Details

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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