Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Other Liabilities Disclosure [Abstract]
Salaries, wages and accrued bonuses	$ 88	$ 85
Fringe benefits	74	60
Provision for contract losses	37	35
Operating lease liabilities	24	28
Taxes payable	17	10
Warranty reserves	32	24
Other	$ 24	$ 27
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total other current liabilities	Total other current liabilities
Total other current liabilities	$ 296	$ 269
Operating lease liabilities	87	95
Unrecognized tax benefits	28	50
Warranty reserves	8	9
Other	$ 8	$ 12
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total other noncurrent liabilities	Total other noncurrent liabilities
Total other noncurrent liabilities	$ 131	$ 166

Salaries, Wages And Accrued Bonuses, Current

No definition available.

Name:	drs_SalariesWagesAndAccruedBonusesCurrent
Namespace Prefix:	drs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).