Acquisition of Cameron - Additional Information (Detail) - Cameron - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Apr. 02, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016
Business Acquisition [Line Items]
Shares of common stock issued in connection with acquisition	138
Value of common stock issued in connection with acquisition	$ 9,900
Cash paid for acquisition	$ 2,800
Revenue reported by Cameron during the first quarter			$ 1,600
Inventory fair value adjustments
Business Acquisition [Line Items]
After-tax amortization of purchase accounting adjustments and other merger and integration cost excluded in pro forma amounts		$ 254		$ 254