Segment Reporting - Operating Information by Segment (Detail) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	[1]			$ 6,705		$ 2,985	$ 2,636
Operating (loss) income				(2,256)		307	138
Goodwill impairment		$ 2,168	[2]	2,168	[3]
Depreciation and amortization				279		101	103
Capital expenditures	[4]			86		119	228
Income (loss) from investments in unconsolidated affiliates				13		(12)
Total assets		9,440		9,440		3,223
Investments in unconsolidated affiliates	[5]	452		452		8
NCSA [Member]
Segment Reporting Information [Line Items]
Goodwill impairment				1,484
EARC [Member]
Segment Reporting Information [Line Items]
Goodwill impairment				40
APAC [Member]
Segment Reporting Information [Line Items]
Goodwill impairment				52
Technology [Member]
Segment Reporting Information [Line Items]
Goodwill impairment				592
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating (loss) income				(1,746)		527	359
Operating Segments [Member] | NCSA [Member]
Segment Reporting Information [Line Items]
Revenues				3,928		246	283
Operating (loss) income				(1,537)		(4)	63
Goodwill impairment	[3]			1,484
Depreciation and amortization				59		26	37
Capital expenditures	[4]			5		23	17
Income (loss) from investments in unconsolidated affiliates						(1)	(1)
Total assets		3,257		3,257		917
Operating Segments [Member] | EARC [Member]
Segment Reporting Information [Line Items]
Revenues				271		19	112
Operating (loss) income				(74)		(13)	(13)
Goodwill impairment	[3]			40
Depreciation and amortization				13
Income (loss) from investments in unconsolidated affiliates				(5)		(4)	(3)
Total assets		1,169		1,169		3
Investments in unconsolidated affiliates	[5]	2		2		1
Operating Segments [Member] | MENA [Member]
Segment Reporting Information [Line Items]
Revenues				1,704		2,120	1,241
Operating (loss) income				328		451	209
Depreciation and amortization				51		31	26
Capital expenditures	[4]			19		31	18
Income (loss) from investments in unconsolidated affiliates				5
Total assets		1,472		1,472		1,022
Investments in unconsolidated affiliates	[5]	60		60
Operating Segments [Member] | APAC [Member]
Segment Reporting Information [Line Items]
Revenues				411		600	1,000
Operating (loss) income				56		93	100
Goodwill impairment	[3]			52
Depreciation and amortization				19		36	31
Capital expenditures	[4]			12		9	190
Income (loss) from investments in unconsolidated affiliates				(8)		(7)	4
Total assets		1,147		1,147		887
Investments in unconsolidated affiliates	[5]					7
Operating Segments [Member] | Technology [Member]
Segment Reporting Information [Line Items]
Revenues				391
Operating (loss) income				(519)
Goodwill impairment	[3]			592
Depreciation and amortization				92
Income (loss) from investments in unconsolidated affiliates				27
Total assets		2,752		2,752
Investments in unconsolidated affiliates	[5]	385		385
Corporate [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	[6]			(510)		(220)	(221)
Depreciation and amortization				45		8	9
Capital expenditures	[4],[7]			50		56	$ 3
Income (loss) from investments in unconsolidated affiliates				(6)
Total assets	[8]	(357)		(357)		$ 394
Investments in unconsolidated affiliates	[5]	$ 5		$ 5

[1] Intercompany amounts have been eliminated in consolidation.

[2] Represents impairment of goodwill associated with our NCSA, EARC, APAC and Technology reporting units, resulting from our annual impairment assessment. See Note 9, Goodwill and Other Intangible Assets, for further discussion.

[3] Represents impairment of goodwill associated with our NCSA, EARC, APAC and Technology reporting units, resulting from our impairment assessment during the fourth quarter of 2018. See Note 9, Goodwill and Other Intangible Assets, for further discussion. The goodwill impairment values are included within the applicable operating group’s Operating loss.

[4] Capital expenditures reported represent cash purchases. At December 31, 2018, 2017 and 2016, we had approximately $26 million, $8 million and $8 million, respectively, of accrued and unpaid capital expenditures reported in PP&E and accrued liabilities.

[5] The Consolidated Balance Sheets as of December 31, 2018 and 2017 include approximately $15 million and $7 million of accounts receivable, respectively, from our unconsolidated affiliates.

[6] ^{(1) Corporate operating results include:} 2018   • $48 million in transaction costs associated with the Combination, see Note 3, Business Combination;   • $134 million in restructuring and integration costs, see Note 12, Restructuring and Integrations Costs;   • $58 million of vessel related impairment charges, see Note 16, Fair Value Measurements; and   • $25 million of expense associated with the need to make alternate arrangements for a third-party vessel charter, because the previously designated vessel was withdrawn from the market. 2017   • $4 million gain on sale of assets; and   • $9 million in transaction costs associated with the Combination, see Note 3, Business Combination.   2016   • $55 million of impairment charges, see Note 16, Fair Value Measurements; and   • $11 million of restructuring expenses, see Note 12, Restructuring and Integration Costs.

[7] Corporate capital expenditures in 2018 include upgrades to the Amazon. Corporate capital expenditures in 2017 include the purchase of the Amazon, a pipelay and construction vessel described in Note 14, Lease Obligations. Following the purchase, we sold this vessel to an unrelated third party and simultaneously entered into an 11-year bareboat charter agreement.

[8] Corporate assets at December 31, 2018 include negative cash balances associated with our international cash pooling program.