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Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2013 case | Dec. 31, 2013
Litigation and Claims |  |
Number of heavy equipment statutes cases tried and completed in Texas state district court | 2 |
Number of other state district court cases in which the entity filed motions for summary judgment | 3 |
Ad valorem tax benefit | $ 8.0 | $ 14.8
Ad valorem tax benefit agreed to by a number of appraisal review boards and county appraisal districts | 3.3 | 3.3
Ad valorem tax benefit in litigation | 11.5 | 11.5
Maximum |  |
Business acquisition, contingent consideration |  |
Contingent payments | $ 46 | $ 46

X
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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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- 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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