The following is a description of principal activities from which the Company generates its revenues. For more detailed information regarding reportable segments, see Note 7: Segment Information. For more detailed information regarding the Company's significant accounting policy for revenue, see Note 2: Summary of Significant Accounting Policies.

The Ingalls and Newport News segments generate revenue primarily from performance under multi-year contracts with the U.S. Government, generally the U.S. Navy and U.S. Coast Guard, or prime contractors to contracts with the U.S. Government, relating to the advance planning, design, construction, repair, maintenance, refueling, overhaul, or inactivation of nuclear-powered ships and non-nuclear ships. The period over which the Company performs may extend past five years. The Mission Technologies segment also generates the majority of its revenue from contracts with the U.S. Government, including U.S. Government agencies. The Company generally invoices and receives related payments based upon performance progress no less frequently than monthly.

Shipbuilding - For most of the Company's shipbuilding contracts, the customer contracts with the Company to provide a comprehensive service of designing, procuring long-lead-time materials, manufacturing, and integrating complex equipment and technologies into a single ship or project, often resulting in a single performance obligation. Contract modifications to account for changes in specifications and requirements are recognized when approved by the customer. In the majority of circumstances, modifications do not result in additional performance obligations that are distinct from the existing performance obligations in the contract, and the effects of the modifications are recognized as an adjustment to revenue on a cumulative catch-up basis. Alternatively, in instances in which the performance obligations in the modifications are deemed distinct, contract modifications are accounted for prospectively.

The Company’s multi-year shipbuilding contracts with the U.S. Government are routinely modified as the result of unpriced change orders arising in the ordinary course of business. These anticipated changes are accounted for as contract modifications when the scope of the work has been approved and it is probable that the price will be approved. The Company recognizes variable consideration included in the transaction price for a modified contract to the extent the Company believes a significant reversal of revenue is not probable.

The Company considers incentive and award fees to be variable consideration and includes in the transaction price at inception the consideration to which the Company expects to be entitled under the terms and conditions of the contract, generally estimated using a most likely amount approach. Estimated revenues represent those amounts for which the Company believes a significant reversal of revenue is not probable.

The Company recognizes revenues related to shipbuilding contracts as it satisfies the related performance obligations over time using a cost-to-cost input method to measure performance progress, which best reflects the transfer of control to the customer.

Services - The Mission Technologies segment generates revenue primarily under U.S. Government contracts. Contracts generally are structured using either an Indefinite Delivery/Indefinite Quantity ("IDIQ") vehicle, under which orders are issued, or a standalone contract. Contracts may be fixed-price or cost-type, include variable consideration such as incentives and awards, and structured as task orders under an IDIQ contract vehicle or requirements contract vehicle. In either case, the Company generally performs services over a shorter duration and may continue to perform upon exercise of related period of performance options that are also shorter in duration. The Company’s performance obligations vary in nature and may be stand-ready, in which case the Company responds to the customer’s needs on the basis of its demand, a recurring service, typically recurring maintenance services, or a single performance obligation that does not comprise a series of distinct services.

estimated revenues represent those amounts for which the Company believes a significant reversal of revenue is not probable. Where a series of distinct services has been identified, the Company generally allocates variable consideration to distinct time increments of service.

The Company generally recognizes revenue as it satisfies the related performance obligations over time using a cost-to-cost input method to measure performance progress, because, even when the Company has identified a series of services, its cost incurrence pattern generally is not ratable given the complex nature of the services the Company provides. Invoices are issued and related payments are received, on the basis of performance progress, no less frequently than monthly. In addition, many of the Company's U.S. Government services contracts are time and material arrangements. As a result, the Company often utilizes the practical expedient allowing the recognition of revenue in the amount the Company invoices, which corresponds with the value provided to the customer and to which the Company is entitled to payment for performance to date.

Revenues generated under commercial and state and local government agency contracts are primarily derived from the provision of nuclear and environmental services. Non-U.S. Government contracts typically are one or two years in duration.

In determining transaction price, the Company considers incentives and other contingencies to be variable consideration and includes in the initial transaction price the consideration to which the Company expects to be entitled under the terms and conditions of the contract, generally estimated using a most likely amount approach. In the context of variable consideration, the Company limits the transaction price to amounts for which the Company believes a significant reversal of revenue is not probable. Such amounts may relate to transaction price in excess of funding, a lack of history with the customer, a lack of history with the goods or services being provided, or other items.

Revenue generally is recognized over time given the terms and conditions of the related contracts. The Company generally utilizes a cost-to-cost input method to measure performance progress, which best reflects the transfer of control to the customer. The Company’s non-U.S. Government contract portfolio is comprised of a large number of time and material arrangements. As a result, the Company often utilizes the practical expedient allowing the recognition of revenue in the amount the Company invoices, which corresponds with the value provided to the customer and to which the Company is entitled to payment for performance to date.

The following tables present revenues on a disaggregated basis, in a manner that reconciles with the Company's reportable segment disclosures, for the following categories: product versus service type, customer type, contract type, and major program. See Note 7: Segment Information. The Company believes that this level of disaggregation provides investors with information to evaluate the Company’s financial performance and provides the Company with information to make capital allocation decisions in the most appropriate manner.


	Year Ended December 31, 2024
($ in millions)	Ingalls		Newport News		Mission Technologies		Intersegment Eliminations		Total
Revenue Type
Product sales	$	2,424	$	4,921	$	119	$	—	$	7,464
Service revenues	335		1,045		2,691		—		4,071
Intersegment	8		3		127		(138)		—
Sales and service revenues	$	2,767	$	5,969	$	2,937	$	(138)	$	11,535
Customer Type
Federal	$	2,759	$	5,964	$	2,804	$	—	$	11,527
Commercial	—		2		5		—		7
State and local government agencies	—		—		1		—		1
Intersegment	8		3		127		(138)		—
Sales and service revenues	$	2,767	$	5,969	$	2,937	$	(138)	$	11,535
Contract Type
Firm fixed-price	$	7	$	7	$	343	$	—	$	357
Fixed-price incentive	2,417		3,127		9		—		5,553
Cost-type	335		2,832		2,281		—		5,448
Time and materials	—		—		177		—		177
Intersegment	8		3		127		(138)		—
Sales and service revenues	$	2,767	$	5,969	$	2,937	$	(138)	$	11,535


	Year Ended December 31, 2023
($ in millions)	Ingalls		Newport News		Mission Technologies		Intersegment Eliminations		Total
Revenue Type
Product sales	$	2,495	$	5,053	$	116	$	—	$	7,664
Service revenues	248		1,077		2,465		—		3,790
Intersegment	9		3		118		(130)		—
Sales and service revenues	$	2,752	$	6,133	$	2,699	$	(130)	$	11,454
Customer Type
Federal	$	2,743	$	6,129	$	2,558	$	—	$	11,430
Commercial	—		1		22		—		23
State and local government agencies	—		—		1		—		1
Intersegment	9		3		118		(130)		—
Sales and service revenues	$	2,752	$	6,133	$	2,699	$	(130)	$	11,454
Contract Type
Firm fixed-price	$	2	$	4	$	322	$	—	$	328
Fixed-price incentive	2,497		3,364		6		—		5,867
Cost-type	244		2,762		2,039		—		5,045
Time and materials	—		—		214		—		214
Intersegment	9		3		118		(130)		—
Sales and service revenues	$	2,752	$	6,133	$	2,699	$	(130)	$	11,454


	Year Ended December 31, 2022
($ in millions)	Ingalls		Newport News		Mission Technologies		Intersegment Eliminations		Total
Revenue Type
Product sales	$	2,372	$	4,821	$	90	$	—	$	7,283
Service revenues	186		1,026		2,181		—		3,393
Intersegment	12		5		116		(133)		—
Sales and service revenues	$	2,570	$	5,852	$	2,387	$	(133)	$	10,676
Customer Type
Federal	$	2,558	$	5,846	$	2,221	$	—	$	10,625
Commercial	—		1		49		—		50
State and local government agencies	—		—		1		—		1
Intersegment	12		5		116		(133)		—
Sales and service revenues	$	2,570	$	5,852	$	2,387	$	(133)	$	10,676
Contract Type
Firm fixed-price	$	8	$	14	$	277	$	—	$	299
Fixed-price incentive	2,369		3,009		—		—		5,378
Cost-type	181		2,824		1,725		—		4,730
Time and materials	—		—		269		—		269
Intersegment	12		5		116		(133)		—
Sales and service revenues	$	2,570	$	5,852	$	2,387	$	(133)	$	10,676


	Year Ended December 31
($ in millions)	2024		2023		2022
Major Programs
Amphibious assault ships	$	1,426	$	1,511	$	1,415
Surface combatants and coast guard cutters	1,330		1,225		1,138
Other	11		16		17
Total Ingalls	2,767		2,752		2,570
Aircraft carriers	3,239		3,374		3,203
Submarines	2,206		2,161		2,002
Other	524		598		647
Total Newport News	5,969		6,133		5,852
C5ISR, CEW&S, LVC	2,458		2,232		1,950

Other	479		467		437
Total Mission Technologies	2,937		2,699		2,387
Intersegment eliminations	(138)		(130)		(133)
Sales and service revenues	$	11,535	$	11,454	$	10,676

As of December 31, 2024, the Company had $48.7 billion of remaining performance obligations. The Company expects to recognize approximately 21% of its remaining performance obligations as revenue through 2025, an additional 35% through 2027, and the balance thereafter.

For each of the years ended December 31, 2024, 2023, and 2022, no individual favorable cumulative catch-up revenue adjustment was material to the Company's consolidated statements of operations and comprehensive income. For each of the years ended December 31, 2024, 2023, and 2022, no individual unfavorable cumulative catch-up revenue adjustment was material to the Company's consolidated statements of operations and comprehensive income.

Contract assets primarily relate to the Company's right to consideration for work completed but not billed as of the reporting date when the right to payment is not subject only to the passage of time. Contract liabilities relate to advance payments, billings in excess of revenues, and deferred revenue amounts.

Contract assets include retention amounts, substantially all of which were under U.S. Government contracts, and were comprised of the following:


	December 31
($ in millions)	2024		2023
Due from U.S. Government	$	1,638	$	1,471
Due from other customers	45		66
Total contract assets	$	1,683	$	1,537

The Company reports contract balances in a net contract asset or contract liability position on a contract-by-contract basis at the end of each reporting period. Net contract assets were comprised as follows:

The Company recognized revenue related to its prior year-end contract liabilities of $938 million, $690 million, and $562 million for the years ended December 31, 2024, 2023, and 2022, respectively.