Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue, Contract Type [Line Items]
Revenues	$ 10,423	$ 9,996	$ 30,242	$ 30,347
Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 5,052	$ 5,252	$ 15,572	$ 15,742
Sales percentage	48.00%	53.00%	51.00%	52.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 5,371	$ 4,744	$ 14,670	$ 14,605
Sales percentage	52.00%	47.00%	49.00%	48.00%
Aeronautics Systems [Member] \| Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,454	$ 1,321	$ 4,254	$ 4,080
Sales percentage	47.00%	45.00%	48.00%	46.00%
Aeronautics Systems [Member] \| Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,646	$ 1,607	$ 4,695	$ 4,886
Sales percentage	53.00%	55.00%	52.00%	54.00%
Aeronautics Systems [Member] \| Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 42	$ 33	$ 121	$ 99
Aeronautics Systems [Member] \| Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	3,142	2,961	9,070	9,065
Defense Systems [Member] \| Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,028	$ 965	$ 3,077	$ 2,843
Sales percentage	51.00%	55.00%	54.00%	54.00%
Defense Systems [Member] \| Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 980	$ 792	$ 2,629	$ 2,423
Sales percentage	49.00%	45.00%	46.00%	46.00%
Defense Systems [Member] \| Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 51	$ 43	$ 149	$ 130
Defense Systems [Member] \| Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	2,059	1,800	5,855	5,396
Mission Systems [Member] \| Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,219	$ 1,216	$ 3,788	$ 3,390
Sales percentage	44.00%	48.00%	47.00%	46.00%
Mission Systems [Member] \| Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,535	$ 1,332	$ 4,254	$ 4,016
Sales percentage	56.00%	52.00%	53.00%	54.00%
Mission Systems [Member] \| Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 339	$ 275	$ 1,015	$ 849
Mission Systems [Member] \| Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	3,093	2,823	9,057	8,255
Space Systems [Member] \| Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,351	$ 1,750	$ 4,453	$ 5,429
Sales percentage	53.00%	63.00%	59.00%	62.00%
Space Systems [Member] \| Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,210	$ 1,013	$ 3,092	$ 3,280
Sales percentage	47.00%	37.00%	41.00%	38.00%
Space Systems [Member] \| Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 137	$ 107	$ 367	$ 312
Space Systems [Member] \| Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,698	$ 2,870	$ 7,912	$ 9,021

NORTHROP GRUMMAN CORP /DE/ 10-Q