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Investments in Foreign Joint Ventures - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013 Joint_Ventures
Schedule of Equity Method Investments [Line Items]
Interest in joint venture foreign	3
BOMAY [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	40.00%
Baoji Oilfield Machinery [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%
AA Energies [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	9.00%
MIEFE [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	41.00%
MIEFE's general manager [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	8.00%
Sonepar Asia Pacific Limited [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%
AAG [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	49.00%
LTDA [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%

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- Definition

Interest in joint venture foreign.

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