Restructuring and Integration Costs and Transaction Costs - Additional Information (Detail) - USD ($)	3 Months Ended																12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018	[2]	Sep. 30, 2018	[2]	Jun. 30, 2018	[2]	Mar. 31, 2018	[2]	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Restructuring and integration costs	$ 11,000,000	[1]	$ 14,000,000	[1]	$ 20,000,000	[1]	$ 69,000,000	[1]	$ 28,000,000	[1]	$ 31,000,000	[1]	$ 63,000,000	[1]	$ 12,000,000	[1]	$ 114,000,000	$ 134,000,000	$ 0
Transaction costs	28,000,000	[3]	$ 14,000,000	[3]	$ 11,000,000	[3]	$ 4,000,000	[3]	$ 3,000,000	[4]	$ 5,000,000	[4]	$ 37,000,000	[4]	$ 3,000,000	[4]	57,000,000	$ 48,000,000	$ 9,000,000
Accrued liability associated with transaction costs	$ 6,000,000																$ 6,000,000

[1] Primarily represents costs related to achieve our CPI. See Note 12, Restructuring and Integration Costs, for further discussion.

[2] Results in the second, third and fourth quarters of 2018 reflect impacts of the Combination from the Combination Date.

[3] 2019—primarily relates to legal and other professional fees associated with the sale processes for the pipe fabrication business and the Lummus Technology business and the now-terminated effort to sell our industrial storage tanks business, as well as professional and other fees associated with the Chapter 11 Cases.

[4] 2018—primarily relates to professional service fees (including audit, legal and advisory services) associated with the Combination. See Note 3, Business Combination, for further discussion.