Goodwill and Other Intangible Assets (Notes)	9 Months Ended
Goodwill and Other Intangible Assets (Notes)	Jul. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Goodwill and Other Intangible Assets Finite-lived intangible assets are amortized to reflect the pattern of economic benefits consumed, which is principally the straight-line method. Intangible assets that are subject to amortization are evaluated for potential impairment whenever events or circumstances indicate that the carrying amount may not be recoverable. No impairment was identified related to our finite-lived intangible assets as of July 31, 2015. Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in a business combination. Goodwill is assigned to specific reporting units, and is tested for impairment at least annually, during the fourth quarter of our fiscal year, or more frequently upon the occurrence of an event or when circumstances indicate that a reporting unit’s carrying amount is greater than its fair value. Due to the prolonged suppressed global commodity markets, its related effect on the global mining investment environment and the resulting impact on our stock price, our total shareholders’ equity exceeded our market capitalization during the latter part of the quarter ended July 31, 2015, indicating the possibility of an impairment to goodwill. Based on this indicator of impairment, we performed an interim test for impairment of goodwill as of the last day of our fiscal third quarter. We have concluded our step one evaluation on our reporting units. After completing this analysis, we determined that the estimated fair value of our Underground reporting unit was lower than the carrying value of the reporting unit. Given the timing of the decline in our market capitalization, we have not completed step two of the goodwill impairment test for this reporting unit, which will determine the amount of impairment loss, if any, for our Underground reporting unit. Step two of the impairment test requires we perform a theoretical purchase price allocation for the Underground reporting unit to determine the implied fair value of goodwill to the recorded amount of goodwill. We have engaged a third party valuation firm to assist in this process. We are unable to provide a reasonable estimate or a range of estimates for the potential non-cash impairment charge at this time. We will complete the analysis during the fourth quarter.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.