Reorganization - Schedule of Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss		$ (1,372)	$ (57)
Adjustments to reconcile net loss to cash flows from operating activities:
Property, plant and equipment impairment		884
Total cash used in operating activities		(695)	(244)
Cash flows from investing activities:
Purchases of property, plant and equipment	[1]	(25)	(18)
Advances related to proportionately consolidated consortiums		(57)	(114)
Total cash used in investing activities		(85)	(133)
Cash flows from financing activities:
DIP Term Facility borrowings		1,200
DIP Credit Facility fees		(87)
Advances related to equity method joint ventures and proportionately consolidated consortiums		69	116
Total cash provided by financing activities		1,177	277
Effects of exchange rate changes on cash, cash equivalents and restricted cash		(3)	(6)
Net increase (decrease) in cash, cash equivalents and restricted cash		394	(106)
Cash, cash equivalents and restricted cash at beginning of period		1,193	845
Cash, cash equivalents and restricted cash at end of period		1,587	$ 739
Debtor in Possession [Member]
Cash flows from operating activities:
Net loss		(1,387)
Adjustments to reconcile net loss to cash flows from operating activities:
Claims valuation adjustments		96
DIP Credit Facility fees		87
Property, plant and equipment impairment		884
Goodwill and intangible assets impairment		94
Charges from parent of subsidiary		5
Other current and non-current assets and liabilities, net		(465)
Total cash used in operating activities		(686)
Cash flows from investing activities:
Purchases of property, plant and equipment		(25)
Advances related to proportionately consolidated consortiums		(57)
Other investing activities		(4)
Total cash used in investing activities		(86)
Cash flows from financing activities:
DIP Term Facility borrowings		1,200
DIP Credit Facility fees		(87)
Advances related to equity method joint ventures and proportionately consolidated consortiums		69
Other financing activities among subsidiaries		(47)
Other financing activities		(5)
Total cash provided by financing activities		1,130
Effects of exchange rate changes on cash, cash equivalents and restricted cash		(3)
Net increase (decrease) in cash, cash equivalents and restricted cash		355
Cash, cash equivalents and restricted cash at beginning of period		1,032
Cash, cash equivalents and restricted cash at end of period		$ 1,387

[1] ^{Capital expenditures reported represent cash purchases. At March 31, 2020 and 2019, we had approximately $47 million and $19 million, respectively, of accrued and unpaid capital expenditures reported in property, plant and equipment and accrued liabilities.}