Goodwill Impairment	9 Months Ended
Goodwill Impairment	Sep. 30, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill Impairment	14. Goodwill Impairment Generally accepted accounting principles require the Company to test goodwill for impairment at least annually or more frequently whenever events or circumstances occur indicating that goodwill might be impaired. Events or circumstances which could indicate a probable impairment include, but are not limited to, a significant reduction in worldwide oil and gas prices or drilling; a significant reduction in profitability or cash flow of oil and gas companies or drilling contractors; a significant reduction in worldwide well remediation activity; a significant reduction in capital investment by other oilfield service companies; or a significant increase in worldwide inventories of oil or gas. The Company considered the sustained decline in worldwide oil and gas prices and rig counts, which has impacted the Company’s current results and future outlook as well as the decline in the market value of the Company’s stock, as indicators that the fair value of the Company’s reporting units’ goodwill could have fallen below their carrying values. As a result, the Company performed an impairment analysis of its goodwill during the third quarter of 2015. The inputs used in the interim impairment test in the second quarter of 2015 were updated for current market conditions and forecasts and the valuation techniques used in the analysis were consistent with those used during previous testing. The Company has not completed the Step 2 measurement of the Company’s reporting units’ goodwill impairment due to the complexities involved in determining the implied fair values of the Company’s reporting units’ goodwill and in light of finalizing purchase accounting related to recent acquisitions. Significant estimates that are subject to change in the Step 2 analysis include, but are not limited to, the valuation of amortizable customer relationships and trade names, preliminary purchase price accounting related to recent acquisitions, estimated fair values of inventory and property, plant and equipment, among others. Any adjustments to the estimated impairment charge in the fourth quarter may be material to our consolidated results. The Company expects to complete the measurement of its reporting units’ goodwill impairment in the three months ended December 31, 2015. The third quarter 2015 goodwill impairment test indicated that two of the Company’s four reporting units’ goodwill were impaired (U.S. Energy and International). In the three and nine months ended September 30, 2015, the Company recognized an estimated impairment of $255 million ($202 million after tax) associated with the fair value of goodwill. The impairment charges were primarily the result of the substantial and sustained decline in oil prices during 2015, actual and forecasted declines in rig activity and the effects of those events and forecasts on the Company’s results of operations. Further, continued adverse market conditions could result in the recognition of additional impairment if the Company determines that the fair values of its reporting units have again fallen below their carrying values.

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.