Pension and Post-retirement Benefits - Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plans [Member] | U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost		$ 18	$ 20	$ 21
Expected return on plan assets		(19)	(20)	(20)
Actuarial loss (gain)		15	(5)	(4)
Net periodic benefit cost (income)	[1],[2]	14	(5)	(3)
Pension Plans [Member] | Non-U. S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		8
Interest cost		12	1	1
Expected return on plan assets		(17)	$ (1)	(1)
Actuarial loss (gain)		33		(1)
Net periodic benefit cost (income)	[1],[2]	36		$ (1)
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost		1
Actuarial loss (gain)		$ (1)

[1] Net periodic benefit cost for 2018 included expense of $37 million for the acquired CB&I plans from the Combination Date through December 31, 2018.

[2] The components of periodic benefit cost (income) other than the service cost component are included within Other non-operating expense (income) in our Statements of Operations. The service cost component is included in Cost of operations and SG&A expenses, in our Statements of Operations, along with other compensation costs rendered by the participating employees.