Acquisitions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Gain on formation of OneSubsea				$ 1,028
Acquisitions and investments, net of cash acquired		$ 443	$ 1,008	1,210
One Subsea
Business Acquisition [Line Items]
Purchase price	$ 600
Ownership interest in joint venture		40.00%
Gain on formation of OneSubsea	$ 1,028
Other Acquisitions
Business Acquisition [Line Items]
Acquisitions and investments, net of cash acquired		$ 443	$ 1,008	$ 610
Shares of common stock issued in connection with acquisition			2.1
Value of common stock issued in connection with acquisition			$ 213