CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Chicago Bridge & Iron Company N.V. [Member]	Common Stock Par Value [Member]	Common Stock Par Value [Member] Chicago Bridge & Iron Company N.V. [Member]	Capital in Excess of Par Value [Member]	Capital in Excess of Par Value [Member] Chicago Bridge & Iron Company N.V. [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) ("AOCI") [Member]	Treasury Stock [Member]	Stockholder's Equity [Member]	Stockholder's Equity [Member] Chicago Bridge & Iron Company N.V. [Member]	Noncontrolling Interest ("NCI") [Member]	Noncontrolling Interest ("NCI") [Member] Chicago Bridge & Iron Company N.V. [Member]
Beginning Balance at Dec. 31, 2016								$ (67)
Net income	$ 154
Other comprehensive loss, net of tax								13
Ending Balance at Sep. 30, 2017								(54)
Beginning Balance at Dec. 31, 2017	1,789		$ 98		$ 1,858		$ (48)	(51)	$ (96)	$ 1,761		$ 28
Adoption of ASC 606 at Dec. 31, 2017	20						20			20
Balance at January 1, 2018 at Dec. 31, 2017	1,809		98		1,858		(28)	(51)	(96)	1,781		28
Net income	79						84			84		(5)
CB&I Combination		$ 1,719		$ 85		$ 1,608					$ 1,693		$ 26
Other comprehensive loss, net of tax	(33)							(33)		(33)
Common stock issued			1		(1)
Stock-based compensation charges	36				36					36
Purchase of treasury shares	(14)								(14)	(14)
Retirement of common stock			(1)		(13)				14
Ending Balance at Sep. 30, 2018	$ 3,596		$ 183		$ 3,488		$ 56	$ (84)	$ (96)	$ 3,547		$ 49