Acquisition of Cameron - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended	9 Months Ended
	Apr. 02, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Revenues		$ 7,019	$ 10,694		$ 22,331	$ 34,473
Cameron
Business Acquisition [Line Items]
Common stock received by Cameron shareholders	71.60%
Cash payment in exchange of each share of common stock	$ 14.44
Revenues				$ 3,000
Pretax operating income				$ 500
After-tax merger and integration charges included or excluded in pro forma amounts		73	$ 73		221	221
Cameron | Inventory Fair Value Adjustment
Business Acquisition [Line Items]
After-tax amortization charges included in pro forma amounts		$ 104			$ 209	$ 209