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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
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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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