Operating Information by Segment and Geographic Area - Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 3,752	$ 3,122
Segment profit (loss)	(141)	96
G&A	(62)	(71)
Impairment	0	63
Foreign currency loss	(41)	(19)
Earnings (loss) before taxes	(100)	87
Continuing Operations
Segment Reporting Information [Line Items]
G&A	(62)	(71)
Impairment	0	63
Foreign currency loss	(41)	(19)
Interest income (expense), net	41	(9)
Earnings (loss) attributable to NCI	(23)	8
Earnings (loss) before taxes	(100)	87
Continuing Operations | Reportable segments
Segment Reporting Information [Line Items]
Revenue	3,752	3,122
Segment profit (loss)	(15)	115
Continuing Operations | Reportable segments | Energy Solutions
Segment Reporting Information [Line Items]
Revenue	1,612	1,174
Segment profit (loss)	88	54
Continuing Operations | Reportable segments | Urban Solutions
Segment Reporting Information [Line Items]
Revenue	1,208	1,061
Segment profit (loss)	(20)	17
Continuing Operations | Reportable segments | Mission Solutions
Segment Reporting Information [Line Items]
Revenue	649	593
Segment profit (loss)	7	58
Continuing Operations | Reportable segments | Other
Segment Reporting Information [Line Items]
Revenue	283	294
Segment profit (loss)	$ (90)	$ (14)