Discontinued Operations - Summary of Carrying Values of Major Classes of Assets and Liabilities of Discontinued Operations (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Total current assets of discontinued operations held for sale	$ 2,451	$ 306
Total assets of discontinued operations held for sale	2,451	2,479
Current liabilities:
Total current liabilities of discontinued operations held for sale	426	383
Accumulated other comprehensive loss	(177)	(103)
Lummus Technology [Member] | Disposed of by Sale [Member]
Current assets:
Cash and cash equivalents	11	10
Restricted cash and cash equivalents	2
Accounts receivable—trade, net	148	144
Accounts receivable—other	4	6
Contracts in progress	92	92
Project-related intangible assets, net	13	15
Inventory	22	33
Other current assets	4	6
Property, plant and equipment, net	59
Operating lease right-of-use assets	14
Investments in unconsolidated affiliates	384
Goodwill	1,137
Other intangibles, net	561
Total current assets of discontinued operations held for sale	2,451	306
Property, plant and equipment, net		62
Operating lease right-of-use assets		15
Investments in unconsolidated affiliates		381
Goodwill		1,140
Other intangibles, net		573
Other non-current assets		2
Total assets of discontinued operations held for sale	2,451	2,479
Current liabilities:
Lease obligations	5	5
Accounts payable	15	21
Advance billings on contracts	217	228
Long-term lease obligations	9
Accrued and other liabilities	180	129
Total current liabilities of discontinued operations held for sale	426	383
Long-term lease obligations		10
Other non-current liabilities		66
Total liabilities of discontinued operations held for sale	426	459
Accumulated other comprehensive loss	$ (14)	$ (11)