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Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Business Acquisition [Line Items]
Purchase price	$ 600
Gain on formation of OneSubsea	1,028
Acquisitions and investments, net of cash acquired	544
OneSubsea
Business Acquisition [Line Items]
Ownership interest in joint venture	40.00%
Gain on formation of OneSubsea	1,028
OneSubsea \| Cameron International Corporation
Business Acquisition [Line Items]
Purchase price	$ 600

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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