Segment Reporting - Information about Operations in Different Segments (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenues	[1]	$ 1,735	$ 789	$ 2,343	$ 1,308
Operating income		49	85	113	137
Depreciation and amortization		58	28	80	50
Capital expenditures	[2]	24	18	43	81
NCSA [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		9	7	16	11
Capital expenditures	[2]		10	2	15
EARC [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		3		3
MENA [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		10	14	16	22
Capital expenditures	[2]	4	5	7	11
APAC [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		2	5	9	13
Capital expenditures	[2]	2	2	5	6
Technology [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		14		14
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income		206	137	348	227
Operating Segments [Member] | NCSA [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	995	42	1,093	70
Operating income		49	(7)	51	(5)
Operating Segments [Member] | EARC [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	58	2	74	18
Operating income		(8)	(5)	(11)	(3)
Operating Segments [Member] | MENA [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	469	557	814	867
Operating income		97	118	167	182
Operating Segments [Member] | APAC [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	108	188	257	353
Operating income		43	31	116	53
Operating Segments [Member] | Technology [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	105		105
Operating income		25		25
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	[3]	(157)	(52)	(235)	(90)
Depreciation and amortization		20	2	22	4
Capital expenditures	[2],[4]	$ 18	$ 1	$ 29	$ 49

[1] Intercompany transactions were not significant for the three and six months ended June 30, 2018 and 2017, respectively.

[2] Liabilities associated with assets acquired during the first six months of 2018 and 2017 were $14 million and $3 million, respectively.

[3] Corporate operating results for the three and six months ended June 30, 2018 include $63 million and $75 million of restructuring and integration costs, respectively. See Note 11, Restructuring and Integration Costs, for further discussion. Corporate operating results for the three and six months ended June 30, 2018 also include $37 million and $40 million of transaction costs, respectively. See Note 3, Business Combination, for further discussion. Corporate operating results for the three and six months ended June 30, 2017 includes approximately $3 million of gain on sale of assets.

[4] Corporate and other capital expenditures in the first half of 2017 include the purchase of the Amazon, a pipelay and construction vessel. Following the purchase, we sold this vessel to an unrelated party and simultaneously entered into an 11-year bareboat charter agreement.