Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Intangible asset amortization expense	$ 169	$ 89
Interest expense	139	133
Operating Segments
Segment Reporting Information [Line Items]
Interest income	5	6
Interest expense	13	$ 13
Operating Segments | April 2016 Acquisition | Cameron
Segment Reporting Information [Line Items]
Intangible asset amortization expense	$ 63