Segment Reporting - Operating Information by Segment (Detail) - USD ($) $ in Millions		3 Months Ended				9 Months Ended			12 Months Ended
		Sep. 30, 2019		Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	[1]	$ 2,121			$ 2,289	$ 6,469		$ 4,632
Operating (loss) income	[2]	(1,684)			129	(1,732)		242
Goodwill impairment		1,370	[3]	$ 0		1,370	[3]		$ 2,200
Depreciation and amortization		63			107	200		187
Capital expenditures	[4]	32			19	65		62
Total assets		8,754				8,754			9,440
NCSA [Member]
Segment Reporting Information [Line Items]
Revenues		47				143
Goodwill impairment						1,111
EARC [Member]
Segment Reporting Information [Line Items]
Goodwill impairment						259
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	[2]	(1,555)			202	(1,276)		550
Operating Segments [Member] | NCSA [Member]
Segment Reporting Information [Line Items]
Revenues		1,090			1,516	3,729		2,609
Operating (loss) income	[2]	(1,405)			97	(1,317)		148
Goodwill impairment	[3]	1,111				1,111
Depreciation and amortization		16			21	47		37
Capital expenditures	[4]	1			2	6		4
Total assets		2,355				2,355			3,257
Operating Segments [Member] | EARC [Member]
Segment Reporting Information [Line Items]
Revenues		248			77	588		151
Operating (loss) income	[2]	(250)			(13)	(239)		(24)
Goodwill impairment	[3]	259				259
Depreciation and amortization		3			5	10		8
Capital expenditures	[4]	1				2
Total assets		1,008				1,008			1,169
Operating Segments [Member] | MENA [Member]
Segment Reporting Information [Line Items]
Revenues		520			473	1,299		1,287
Operating (loss) income	[2]	69			89	164		256
Depreciation and amortization		14			19	39		35
Capital expenditures	[4]	3			2	11		9
Total assets		1,657				1,657			1,472
Operating Segments [Member] | APAC [Member]
Segment Reporting Information [Line Items]
Revenues		125			75	413		332
Operating (loss) income	[2]	1			9	16		125
Depreciation and amortization		3			3	10		12
Capital expenditures	[4]	1			4	6		9
Total assets		1,169				1,169			1,147
Operating Segments [Member] | Technology [Member]
Segment Reporting Information [Line Items]
Revenues		138			148	440		253
Operating (loss) income	[2]	30			20	100		45
Depreciation and amortization		17			45	54		59
Capital expenditures	[4]	1				1
Total assets		2,747				2,747			2,752
Corporate [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	[2]	(129)			(73)	(456)		(308)
Depreciation and amortization		10			14	40		36
Capital expenditures	[4]	25			$ 11	39		$ 40
Total assets	[5]	$ (182)				$ (182)			$ (357)

[1] Intercompany amounts have been eliminated in consolidation.

[2] (1) Operating results for NCSA and EARC for the three and nine months ended September 30, 2019 include the impacts of the goodwill and intangible assets impairments discussed below. In addition, NCSA operating results for the nine months ended September 30, 2019 include a $101 million loss on the sale of APP, discussed in Note 4, Acquisition and Disposition Transactions. Corporate operating results for the three and nine months ended September 30, 2019 included:   • $14 million and $103 million of restructuring and integration costs, respectively;   • $14 million and $29 million of transaction costs, respectively; and   • $18 million of vessel and marine operations related impairment charges, see Note 16, Fair Value Measurements. Corporate operating results for the three and nine months ended September 30, 2018 included:   • $31 million and $106 million of restructuring and integration costs, respectively; and   • $5 million and $45 million of transaction costs, respectively. See Note 11, Restructuring and Integration Costs and Transaction Costs, for further discussion.

[3] Represents impairment of goodwill associated with our NCSA and EARC reporting units, resulting from our interim impairment assessment during the third quarter of 2019. In addition, in the third quarter of 2019 we recorded $143 million of impairment associated with NCSA intangible assets. The goodwill impairment values are included within the applicable operating segment’s operating loss. See Note 9, Goodwill and Other Intangible Assets, for further discussion.

[4] ^{Capital expenditures reported represent cash purchases. As of September 30, 2019, we had approximately $127 million of accrued and unpaid capital expenditures reported in property, plant and equipment; the balance as of September 30, 2018 was not material.}

[5] ^{Corporate assets as of September 30, 2019 and December 31, 2018 include negative cash balances associated with our international cash pooling program.}