Pension and Post-retirement Benefits - Net Periodic Benefit Cost (Income) (Parenthetical) (Detail) - USD ($) $ in Millions		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)		$ (6)
CB&I [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 37
Netherlands [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)		(37)
United Kingdom [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)		7
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)		$ 23