Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 30, 2026	Jan. 31, 2025	Feb. 02, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 7,262	$ 7,479	$ 7,444
Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	5,581	5,726	5,817
Civilian
Disaggregation of Revenue [Line Items]
Revenues	1,681	1,753	1,627
Prime contractor to federal government
Disaggregation of Revenue [Line Items]
Revenues	6,464	6,669	6,722
Prime contractor to federal government \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	5,073	5,198	5,355
Prime contractor to federal government \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	1,391	1,471	1,367
Subcontractor to federal government
Disaggregation of Revenue [Line Items]
Revenues	617	646	568
Subcontractor to federal government \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	479	499	445
Subcontractor to federal government \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	138	147	123
Other
Disaggregation of Revenue [Line Items]
Revenues	181	164	154
Other \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	29	29	17
Other \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	152	135	137
Cost reimbursement
Disaggregation of Revenue [Line Items]
Revenues	4,485	4,636	4,527
Cost reimbursement \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	4,429	4,548	4,442
Cost reimbursement \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	56	88	85
Time and materials ("T&M")
Disaggregation of Revenue [Line Items]
Revenues	1,633	1,647	1,463
Time and materials ("T&M") \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	510	559	491
Time and materials ("T&M") \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	1,123	1,088	972
Firm-fixed price ("FFP")
Disaggregation of Revenue [Line Items]
Revenues	1,144	1,196	1,454
Firm-fixed price ("FFP") \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	642	619	884
Firm-fixed price ("FFP") \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	502	577	570
Department of War
Disaggregation of Revenue [Line Items]
Revenues	3,778	3,873	3,840
Department of War \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	3,770	3,856	3,814
Department of War \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	8	17	26
Intelligence and other federal government agencies
Disaggregation of Revenue [Line Items]
Revenues	3,303	3,442	3,450
Intelligence and other federal government agencies \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	1,782	1,841	1,986
Intelligence and other federal government agencies \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	1,521	1,601	1,464
Commercial, state and local governments and international
Disaggregation of Revenue [Line Items]
Revenues	181	164	154
Commercial, state and local governments and international \| Defense and Intelligence
Disaggregation of Revenue [Line Items]
Revenues	29	29	17
Commercial, state and local governments and international \| Civilian
Disaggregation of Revenue [Line Items]
Revenues	$ 152	$ 135	$ 137