Debt - Schedule of Uncommitted Bilateral Credit Facilities and Surety Bond Arrangements (Detail) - Uncommitted Bilateral Letter of Credit Facilities and Surety Bond Arrangements [Member] - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Bank Guarantee and Bilateral Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity under credit facility	[1]	$ 1,842	$ 1,669
Letters of credit outstanding	[1]	1,293	1,060
Surety Bonds [Member]
Debt Instrument [Line Items]
Available capacity under credit facility	[2]	835	842
Letters of credit outstanding	[2]	$ 601	$ 475

[1] ^{Approximately $175 million of this capacity is available only upon provision of an equivalent amount of cash collateral.}

[2] ^{Excludes approximately $312 million of surety bonds maintained on behalf of CB&I’s former Capital Services Operations, which were sold to CSVC Acquisition Corp (“CSVC”) in June 2017. We also continue to maintain guarantees on behalf of CB&I’s former Capital Services Operations business and we are entitled to an indemnity from CSVC for the surety bonds and guarantees.}