Project Changes in Estimates - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	$ 150,000,000
Estimated additional project costs, recovery recognized from customers	0
COVID-19 Pandemic [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	79,000,000
NCSA [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	115,000,000	$ 24,000,000
NCSA [Member] | Cameron LNG and Freeport LNG Project [Member] | LNG Project [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	11,000,000
NCSA [Member] | Total Ethane Cracker Project [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	47,000,000
NCSA [Member] | Total Ethane Cracker Project [Member] | Downstream Petrochemical Projects [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	54,000,000
NCSA [Member] | Rota 3 Pipeline and Other Projects [Member] | Offshore and Subsea Projects [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	68,000,000
NCSA [Member] | COVID-19 Pandemic [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	39,000,000
EARC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results		4,000,000
EARC [Member] | Total Tyra Redevelopment Project
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	11,000,000
EARC [Member] | COVID-19 Pandemic [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	11,000,000
EARC [Member] | COVID-19 Pandemic [Member] | Total Tyra Redevelopment Project
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	9,000,000
MENA [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	13,000,000	33,000,000
MENA [Member] | COVID-19 Pandemic [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	17,000,000
APAC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results		6,000,000
APAC [Member] | Reliance subsea field development project [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	7,000,000
APAC [Member] | COVID-19 Pandemic [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	12,000,000
APAC [Member] | COVID-19 Pandemic [Member] | Reliance subsea field development project [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results	$ 13,000,000
NCSA, EARC, MENA and APAC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Effect of changes in estimated project cost on operating results		$ 19,000,000