Revenue Recognition - Summary of Revenue by Product Offering, Contract Types and Revenue Recognition Methodology (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 8,431	$ 6,705	$ 2,985
Offshore and subsea [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	2,845	2,289	2,985
LNG [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	1,445	1,309
Downstream [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1],[2]	3,173	2,224
Power [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	968	883
Fixed priced [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	6,835	5,239	2,895
Reimbursable [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	926	1,004
Hybrid [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	485	260
Unit-basis and other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	185	202	90
Over time [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	8,283	6,628	$ 2,985
At a point in time [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 148	$ 77

[1] Intercompany amounts have been eliminated in consolidation.

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