Segment Reporting - Revenue and Operating Results from Continuing Operations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Goodwill impairment	$ 91	$ 3,500
Property, plant and equipment impairment	884
Vessels and Fabrication Yards [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment impairment	$ 884

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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