Revenue Recognition - Summary of Revenue by Product Offering, Contract Types and Revenue Recognition Methodology (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 2,211	$ 608
Offshore and subsea [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	605	608
LNG [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	421
Downstream [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1],[2]	862
Power [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	323
Fixed priced [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	1,726	583
Reimbursable [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	303
Hybrid [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	110
Unit-basis and other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	72	25
Over time [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	2,160	$ 608
At a point in time [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 51

[1] Intercompany amounts have been eliminated in consolidation.

[2] Includes the results of our Technology operating group.