Operating Information by Segment and Geographic Area - Schedule of Total Assets by Segment (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Total assets	$ 7,536	$ 8,236
Operating Segments \| Urban Solutions
Segment Reporting [Line Items]
Total assets	2,026	1,769
Operating Segments \| Energy Solutions
Segment Reporting [Line Items]
Total assets	523	621
Operating Segments \| Mission Solutions
Segment Reporting [Line Items]
Total assets	821	733
Corporate \| Corporate
Segment Reporting [Line Items]
Total assets	4,165	3,532
Other
Segment Reporting [Line Items]
Total assets	$ 1	$ 1,581

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details