Discontinued Operations - Results of Discontinued Operations in our Statement of Operations (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Costs and Expenses:
Net (loss) income from discontinued operations		$ (14)	$ 38
Lummus Technology [Member] | Disposed of by Sale [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Revenues		150	148
Costs and Expenses:
Cost of operations		90	89
Project intangibles and inventory-related amortization		2	4
Total cost of operations		92	93
Research and development expenses		7	6
Selling, general and administrative expenses		6	5
Other intangibles amortization		11	11
Total expenses		116	115
Income from investments in unconsolidated affiliates		5	8
Investment in unconsolidated affiliates-related amortization		(2)	(2)
Operating income from discontinued operations		37	39
Interest expense, net	[1]	(26)	(1)
Reorganization items, net	[2]	(19)
(Loss) income from discontinued operations before provision for income taxes		(8)	38
Income tax expense		6
Net (loss) income from discontinued operations		$ (14)	$ 38

[1] ^{Interest expense was allocated to the discontinued operations, due to a requirement to use the proceeds from the sale to repay our debtor-in-possession financing, and included: (1) $26 million of interest expense associated with the DIP Credit Agreement (discussed in Note 11, Debt); (2) an $11 million non-cash charge included in interest expense and associated with the accretion of the make-whole amount owed to the lenders under our Superpriority Credit Agreement, which was rolled up and deemed issued under the DIP Credit Agreement; (3) $17 million of expense related to amortization of the discount offset by a $28 million gain, resulting from the remeasurement of embedded derivative liability, both of which are associated with the indebtedness and other obligations under our Superpriority Credit Agreement, which were rolled up and deemed issued under the DIP Credit Agreement}

[2] ^{Reorganization items allocated to the discontinued operations include professional and other fees associated with the Lummus Technology sale process, which were incurred post-Petition Date}