Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Gain on formation of OneSubsea	$ 1,028		$ 1,028
Acquisitions and investments, net of cash acquired		471	117
Shares of common stock issued in connection with acquisition		2.1
Value of common stock issued in connection with acquisition		213
One Subsea
Business Acquisition [Line Items]
Ownership interest in joint venture		40.00%
Gain on formation of OneSubsea		1,028
One Subsea | Parent Company
Business Acquisition [Line Items]
Purchase price		$ 600