Operating Information by Segment and Geographic Area - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disposal Group, Not Discontinued Operations | AMECO
Segment Reporting Information [Line Items]
Proceeds from divestiture of businesses		$ 144
Cash divestiture		17
Loss on sale		60
AMECO divestiture, negative impact on earnings from foreign currency translation		$ 35
Energy Solutions
Segment Reporting Information [Line Items]
Expense from embedded foreign currency derivatives	$ 8		$ 17	$ 47	$ 4
Energy Solutions | Chemicals Project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost	$ 74			$ 74
Effect of forecast revision on estimated project cost (in dollars per share)	$ 0.31			$ 0.31
Energy Solutions | Upstream Project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost	$ 34			$ 34
Effect of forecast revision on estimated project cost (in dollars per share)	$ 0.20			$ 0.20
Energy Solutions | Large LNG Project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost				$ 22
Effect of forecast revision on estimated project cost (in dollars per share)				$ 0.09
Urban Solutions
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost			$ 32		$ 32
Effect of forecast revision on estimated project cost (in dollars per share)			$ 0.14		$ 0.14
Urban Solutions | LAX Automated People Mover Project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost				$ 59
Effect of forecast revision on estimated project cost (in dollars per share)				$ 0.34
Mission Solutions | Weapons Facility Project
Segment Reporting Information [Line Items]
Effect of forecast revision on estimated project cost				$ 30
Effect of forecast revision on estimated project cost (in dollars per share)				$ 0.17