Huntington Ingalls Industries (HII) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 04, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Period Focus	'Q3	'
Document Fiscal Year Focus	'2013	'
Entity Registrant Name	'HUNTINGTON INGALLS INDUSTRIES, INC.	'
Entity Central Index Key	'0001501585	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	49,373,379

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales and service revenues	'	'	'	'
Product sales	$1,394	$1,367	$4,138	$4,224
Service revenues	243	229	744	661
Total sales and service revenues	1,637	1,596	4,882	4,885
Cost of sales and service revenues	'	'	'	'
Cost of product sales	1,123	1,187	3,366	3,578
Cost of service revenues	210	186	650	562
Income (loss) from operating investments, net	9	7	13	13
General and administrative expenses	186	164	541	506
Operating income (loss)	127	66	338	252
Other income (expense)	'	'	'	'
Interest expense	-28	-29	-87	-88
Earnings (loss) before income taxes	99	37	251	164
Federal income taxes	30	24	81	68
Net earnings (loss)	69	13	170	96
Basic earnings (loss) per share (in dollars per share)	$1.38	$0.26	$3.41	$1.95
Weighted-average common shares outstanding (in shares)	49.9	49.6	49.9	49.3
Diluted earnings (loss) per share (in dollars per share)	$1.36	$0.26	$3.37	$1.92
Weighted-average diluted shares outstanding (in shares)	50.6	50.3	50.5	49.9
Dividends declared per share	$0.10	'	$0.30	'
Other comprehensive income (loss)	'	'	'	'
Change in unamortized benefit plan costs	31	23	246	68
Other	2	'	3	'
Tax benefit (expense) for items of other comprehensive income	-15	-6	-101	-23
Other comprehensive income (loss), net of tax	18	17	148	45
Comprehensive income (loss)	$87	$30	$318	$141

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Financial Position (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current Assets	'	'
Cash and cash equivalents	$895	$1,057
Accounts receivable, net	1,055	905
Inventoried costs, net	340	288
Deferred income taxes	218	213
Prepaid expenses and other current assets	23	21
Total current assets	2,531	2,484
Property, plant, and equipment, net	1,964	2,034
Goodwill	881	881
Other purchased intangibles, net	532	548
Long-term deferred tax asset	248	329
Miscellaneous other assets	123	116
Total assets	6,279	6,392
Current Liabilities	'	'
Trade accounts payable	287	377
Accrued employees' compensation	205	235
Current portion of long-term debt	65	51
Current portion of postretirement plan liabilities	148	166
Current portion of workers' compensation liabilities	225	216
Advance payments and billings in excess of costs incurred	139	134
Income taxes payable	73	'
Other current liabilities	260	205
Total current liabilities	1,402	1,384
Long-term debt	1,743	1,779
Pension plan liabilities	1,082	1,301
Other postretirement plan liabilities	656	799
Workers' compensation liabilities	409	403
Other long-term liabilities	52	59
Total liabilities	5,344	5,725
Commitments and Contingencies (Note 13)	'	'
Stockholders' Equity	'	'
Common stock, $0.01 par value; 150 million shares authorized; 50.4 million issued and 49.5 million outstanding as of September 30, 2013, and 49.6 million issued and outstanding as of December 31, 2012	1	'
Additional paid-in capital	1,914	1,894
Retained earnings (deficit)	155	'
Treasury stock	-57	-1
Accumulated other comprehensive income (loss)	-1,078	-1,226
Total stockholders' equity	935	667
Total liabilities and stockholders' equity	$6,279	$6,392

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Financial Position (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]	'	'
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	50,400,000	49,600,000
Common stock, shares outstanding (in shares)	49,500,000	49,600,000

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities	'	'
Net earnings (loss)	$170	$96
Adjustments to reconcile to net cash provided by (used in) operating activities	'	'
Depreciation	135	122
Amortization of purchased intangibles	16	15
Amortization of debt issuance costs	6	6
Stock-based compensation	28	25
Excess tax benefit related to stock-based compensation	-5	'
Deferred income taxes	-19	44
Change in	'	'
Accounts receivable	-150	-172
Inventoried costs	-102	57
Prepaid expenses and other assets	-16	-8
Accounts payable and accruals	12	-134
Retiree benefits	-134	-93
Other non-cash transactions, net	3	1
Net cash provided by (used in) operating activities	-56	-41
Investing Activities	'	'
Additions to property, plant, and equipment	-85	-92
Proceeds from insurance settlement	58	'
Net cash provided by (used in) investing activities	-27	-92
Financing Activities	'	'
Repayment of long-term debt	-22	-22
Dividends paid	-15	'
Repurchases of common stock	-53	'
Proceeds from stock option exercises	6	6
Excess tax benefit related to stock-based compensation	5	'
Net cash provided by (used in) financing activities	-79	-16
Change in cash and cash equivalents	-162	-149
Cash and cash equivalents, beginning of period	1,057	915
Cash and cash equivalents, end of period	895	766
Supplemental Cash Flow Disclosure	'	'
Cash paid for income taxes	54	28
Cash paid for interest	101	102
Non-Cash Investing and Financing Activities	'	'
Capital expenditures accrued in accounts payable	$2	$2

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Changes In Equity (Unaudited) (USD $)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
In Millions, unless otherwise specified
Balance at Dec. 31, 2011	$872	'	$1,862	($141)	'	($849)
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net earnings (loss)	96	'	'	96	'	'
Additional paid-in capital	25	'	25	'	'	'
Other comprehensive income (loss), net of tax	45	'	'	'	'	45
Balance at Sep. 30, 2012	1,038	'	1,887	-45	'	-804
Balance at Dec. 31, 2012	667	'	1,894	'	-1	-1,226
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net earnings (loss)	170	'	'	170	'	'
Dividends declared	-15	'	'	-15	'	'
Additional paid-in capital	20	'	20	'	'	'
Other comprehensive income (loss), net of tax	148	'	'	'	'	148
Common stock	1	1	'	'	'	'
Treasury stock activity	-56	'	'	'	-56	'
Balance at Sep. 30, 2013	$935	$1	$1,914	$155	($57)	($1,078)

Description_of_Business

Description of Business	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business	'
	DESCRIPTION OF BUSINESS
	For more than a century, Huntington Ingalls Industries, Inc. ("HII" or the "Company") has been designing, building, overhauling and repairing ships primarily for the U.S. Navy and the U.S. Coast Guard. HII is organized into two operating segments, Ingalls and Newport News, which also represent its reportable segments. Through its Ingalls segment, HII is a builder of amphibious assault and expeditionary ships for the U.S. Navy, the sole builder of National Security Cutters for the U.S. Coast Guard, and one of only two companies that builds the Navy's current fleet of DDG-51 Arleigh Burke-class destroyers. Through its Newport News segment, HII is the nation's sole designer, builder and refueler of nuclear-powered aircraft carriers, and one of only two companies currently designing and building nuclear-powered submarines for the U.S. Navy. HII is one of the nation's leading full-service providers for the design, engineering, construction and life cycle support of major surface ship programs for the U.S. Navy. As prime contractor, principal subcontractor, team member or partner, HII participates in many high-priority U.S. defense technology programs. The Company conducts substantially all of its business with the U.S. Government, principally the Department of Defense ("DoD").
	On March 29, 2011, HII entered into a Separation and Distribution Agreement with its former parent company, Northrop Grumman Corporation ("Northrop Grumman"), and Northrop Grumman's subsidiaries (Northrop Grumman Shipbuilding, Inc. and Northrop Grumman Systems Corporation), pursuant to which HII was legally and structurally separated from Northrop Grumman.
	In connection with the spin-off, HII entered into a Transition Services Agreement with Northrop Grumman, under which Northrop Grumman or certain of its subsidiaries provided HII with certain enterprise shared services (including information technology, resource planning, financial, procurement and human resource services), benefits support services and other specified services to HII at cost. The term of the Transition Services Agreement ended on October 9, 2012. For the three and nine months ended September 30, 2012, costs incurred for services under the Transition Services Agreement were approximately $3 million and $19 million, respectively.
	In connection with the spin-off, HII entered into new borrowing arrangements to provide the Company with adequate liquidity and to fund a $1,429 million contribution to Northrop Grumman. Specifically, HII issued $1,200 million in senior notes and entered into the HII Credit Facility ("Credit Facility") with third-party lenders that includes a $650 million revolver and a $575 million term loan. See Note 11: Debt.
	The spin-off from Northrop Grumman was a transaction under common control; therefore, no change in the historical basis of HII's assets or liabilities was recorded as part of the spin-off.

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	BASIS OF PRESENTATION
	Principles of Consolidation - The unaudited condensed consolidated financial statements of HII and its subsidiaries have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP") and the instructions to Form 10-Q promulgated by the Securities and Exchange Commission ("SEC"). All intercompany transactions and balances are eliminated in consolidation. For classification of current assets and liabilities related to its long-term production contracts, the Company uses the duration of these contracts as its operating cycle, which is generally longer than one year. Additionally, certain prior year amounts have been reclassified to conform to the current year presentation.
	These unaudited condensed consolidated financial statements include all adjustments of a normal recurring nature considered necessary by management for a fair presentation of the unaudited condensed consolidated financial position, results of operations, and cash flows. These unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012.
	The quarterly information is labeled using a calendar convention; that is, first quarter is consistently labeled as ending on March 31, second quarter as ending on June 30, and third quarter as ending on September 30. It is management's long-standing practice to establish interim closing dates using a "fiscal" calendar, which requires the businesses to close their books on a Friday near these quarter-end dates in order to normalize the potentially disruptive effects of quarterly closings on business processes. The effects of this practice only exist for interim periods within a reporting year.
	Equity - On each of March 15, 2013, June 14, 2013, and September 13, 2013, the Company paid quarterly cash dividends of $0.10 per share, which totaled $15 million year-to-date. During 2012, the Company's board of directors authorized a program to repurchase up to $150 million of the Company's common stock over three years. On October 30, 2013, the Company's board of directors authorized an increase in the stock repurchase program from $150 million to $300 million and an extension of the term of the program from October 31, 2015, to October 31, 2017. Purchases under the stock repurchase program may be made from time to time in the discretion of management in the open market, through privately negotiated transactions or through other means, are subject to prevailing market conditions and other factors, and may be suspended or discontinued at any time. For the nine months ended September 30, 2013, the Company repurchased 919,866 shares at a cost of $56 million, which is recorded as treasury stock in the unaudited condensed consolidated statements of financial position.
	Accounting Estimates - The preparation of the Company's unaudited condensed consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Estimates have been prepared on the basis of the most current and best available information and actual results could differ materially from those estimates.
	The Budget Control Act of 2011 will result in significant decreases in DoD spending starting in 2013, which could negatively impact the Company's revenues and its estimated recovery of goodwill and other long-lived assets.
	The Company recognizes changes in estimates of contract sales, costs and profits using the cumulative catch-up method of accounting. This method recognizes in the current period the cumulative effect of the changes on current and prior periods. Hence, the effect of the changes on future periods of contract performance is recognized as if the revised estimate had been the original estimate. For the three months ended September 30, 2013 and 2012, net cumulative catch-up adjustments increased (decreased) operating income by $2 million and $(9) million, respectively, and increased (decreased) diluted earnings per share by $0.02 and $(0.12), respectively. For the nine months ended September 30, 2013 and 2012, net cumulative catch-up adjustments increased operating income by $67 million and $39 million, respectively, and increased diluted earnings per share by $0.86 and $0.50, respectively.

Accounting_Standards_Updates

Accounting Standards Updates	9 Months Ended
	Sep. 30, 2013
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Accounting Standards Updates	'
	ACCOUNTING STANDARDS UPDATES
	In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update 2013-02 "Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income" ("ASU 2013-02"). This update requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income (loss) by component, and their corresponding effects on net income if required under GAAP to be reclassified to net income in their entirety in the same reporting period; otherwise, cross-reference to other disclosures is required. ASU 2013-02 is effective for all reporting periods beginning after December 15, 2012. The Company adopted ASU 2013-02 as of January 1, 2013 without material impact on the unaudited condensed consolidated financial statements. See Note 16: Employee Pension and Other Postretirement Benefits.

Avondale

Avondale	9 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]	'
Avondale	'
	AVONDALE
	In July 2010, plans were announced to consolidate the Company's Ingalls operations by winding down and subsequently closing the Avondale, Louisiana facility in 2013 after completing LPD-class ships that were under construction at this facility. The Company intends to build future LPD-class ships at the Company's Pascagoula, Mississippi facility, although the Company intends to utilize the Avondale facility into 2014 to complete construction of certain LPD assemblies. The consolidation is intended to reduce costs, increase efficiency, and address shipbuilding overcapacity.
	In connection with and as a result of the decision to wind down military shipbuilding at the Avondale, Louisiana facility, the Company began incurring and paying related costs, including, but not limited to, severance expense, relocation expense, and asset write-downs related to the Avondale facilities. Management's current estimate of these expenditures is $256 million. Such costs are expected to be recoverable under existing flexibly-priced contracts or future negotiated contracts in accordance with Federal Acquisition Regulation ("FAR") provisions for the treatment of restructuring and shutdown related costs. The Company is currently in discussions with the U.S. Navy regarding its cost submission to support the recoverability of these costs under the FAR and applicable contracts.
	The Defense Contract Audit Agency ("DCAA"), a DoD agency, prepared an initial audit report on the Company's July 30, 2010 cost proposal for restructuring and shutdown related costs of $310 million, which stated that the proposal was not adequately supported for the DCAA to reach a conclusion and questioned approximately $25 million, or 8%, of the costs submitted by the Company. The Company then submitted a revised proposal dated October 12, 2011 to address the concerns of the DCAA and to reflect a revised estimated total cost of $271 million. The Company received a supplemental audit report, which again stated that the proposal was not sufficiently supported to allow the DCAA to reach a conclusion. However, the report, while qualified and not final, supports the Company's position that, in general, most of the categories of costs incorporated in the proposal are allowable as restructuring activities. The amount and percentage of questioned costs are materially unchanged from the previous audit report. The Company submitted another revised proposal further addressing the DCAA concerns and supporting management's current restructuring cost estimate of $256 million.
	Ultimately, the Company anticipates agreement with the U.S. Navy that is substantially in accordance with management's cost recovery expectations. Accordingly, HII has treated these costs as allowable costs in determining the earnings performance on its contracts in process. The actual restructuring expenses related to the wind down may be greater than the Company's current estimate, and any inability to recover such costs could result in a material effect on the Company's consolidated financial position, results of operations or cash flows.
	The Company also evaluated the effect that the wind down of the Avondale facilities might have on the benefit plans in which HII employees participate. HII determined that the potential impact of a curtailment in these plans was not material to its consolidated financial position, results of operations or cash flows.
	Although closure is still the baseline assumption for Avondale, the Company is pursuing engineering and manufacturing opportunities in the energy infrastructure market as well as other industrial manufacturing opportunities. On September 26, 2013, the New Orleans Metals Trades ratified a new labor agreement in connection with the Company's pursuit of other opportunities at Avondale. We are also evaluating opportunities for commercial vessel construction, which are being driven by demand in support of Jones Act requirements. In addition, the Company intends to utilize the facility into 2014 to complete construction of certain LPD assemblies. Ultimately, if the Company is successful in pursuing such opportunities, and Avondale were to remain open, the Company would submit a revised restructuring proposal to the U.S. Navy consistent with this change. In such event, the Company expects the total estimated restructuring costs would decrease. While the restructuring costs that are currently capitalized as incurred, consisting primarily of severance and retention payments, should remain recoverable under existing or future U.S. Navy contracts, other costs would remain as part of the Avondale cost structure associated with Avondale's new line of business.
	The table below summarizes the changes in the Company's liability for restructuring and shutdown related costs associated with winding down the Avondale facility. As of September 30, 2013 and 2012, these costs were comprised primarily of employee severance and retention payments as well as incentive bonuses. These amounts were capitalized in inventoried costs, and will be recognized as expenses in cost of product sales beginning in 2014.
	($ in millions)
	Balance as of December 31, 2011	$	50
	Payments	(29		)
	Adjustments	9
	Balance as of September 30, 2012	$	30
	Balance as of December 31, 2012	$	24
	Payments	(14		)
	Adjustments	8
	Balance as of September 30, 2013	$	18
	GULFPORT
	On September 3, 2013, the Company approved the closing of its Gulfport Composite Center of Excellence in Gulfport, Mississippi, part of the Ingalls reportable segment, which it intends to complete by May 2014. In connection with this closure, the Company expects to incur total costs of approximately $57 million, consisting primarily of approximately $52 million in accelerated depreciation of fixed assets, $2 million in personnel related costs and $3 million in facility shutdown and other related costs. All but approximately $4 million of the total costs are non-cash, and approximately $13 million of the total costs was recorded in the three and nine months ended September 30, 2013. These costs reduced operating income for the three and nine months ended September 30, 2013 by $17 million, and no material impact on operating income is anticipated in subsequent periods.

Gulfport

Gulfport	9 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]	'
Gulfport	'
	AVONDALE
	In July 2010, plans were announced to consolidate the Company's Ingalls operations by winding down and subsequently closing the Avondale, Louisiana facility in 2013 after completing LPD-class ships that were under construction at this facility. The Company intends to build future LPD-class ships at the Company's Pascagoula, Mississippi facility, although the Company intends to utilize the Avondale facility into 2014 to complete construction of certain LPD assemblies. The consolidation is intended to reduce costs, increase efficiency, and address shipbuilding overcapacity.
	In connection with and as a result of the decision to wind down military shipbuilding at the Avondale, Louisiana facility, the Company began incurring and paying related costs, including, but not limited to, severance expense, relocation expense, and asset write-downs related to the Avondale facilities. Management's current estimate of these expenditures is $256 million. Such costs are expected to be recoverable under existing flexibly-priced contracts or future negotiated contracts in accordance with Federal Acquisition Regulation ("FAR") provisions for the treatment of restructuring and shutdown related costs. The Company is currently in discussions with the U.S. Navy regarding its cost submission to support the recoverability of these costs under the FAR and applicable contracts.
	The Defense Contract Audit Agency ("DCAA"), a DoD agency, prepared an initial audit report on the Company's July 30, 2010 cost proposal for restructuring and shutdown related costs of $310 million, which stated that the proposal was not adequately supported for the DCAA to reach a conclusion and questioned approximately $25 million, or 8%, of the costs submitted by the Company. The Company then submitted a revised proposal dated October 12, 2011 to address the concerns of the DCAA and to reflect a revised estimated total cost of $271 million. The Company received a supplemental audit report, which again stated that the proposal was not sufficiently supported to allow the DCAA to reach a conclusion. However, the report, while qualified and not final, supports the Company's position that, in general, most of the categories of costs incorporated in the proposal are allowable as restructuring activities. The amount and percentage of questioned costs are materially unchanged from the previous audit report. The Company submitted another revised proposal further addressing the DCAA concerns and supporting management's current restructuring cost estimate of $256 million.
	Ultimately, the Company anticipates agreement with the U.S. Navy that is substantially in accordance with management's cost recovery expectations. Accordingly, HII has treated these costs as allowable costs in determining the earnings performance on its contracts in process. The actual restructuring expenses related to the wind down may be greater than the Company's current estimate, and any inability to recover such costs could result in a material effect on the Company's consolidated financial position, results of operations or cash flows.
	The Company also evaluated the effect that the wind down of the Avondale facilities might have on the benefit plans in which HII employees participate. HII determined that the potential impact of a curtailment in these plans was not material to its consolidated financial position, results of operations or cash flows.
	Although closure is still the baseline assumption for Avondale, the Company is pursuing engineering and manufacturing opportunities in the energy infrastructure market as well as other industrial manufacturing opportunities. On September 26, 2013, the New Orleans Metals Trades ratified a new labor agreement in connection with the Company's pursuit of other opportunities at Avondale. We are also evaluating opportunities for commercial vessel construction, which are being driven by demand in support of Jones Act requirements. In addition, the Company intends to utilize the facility into 2014 to complete construction of certain LPD assemblies. Ultimately, if the Company is successful in pursuing such opportunities, and Avondale were to remain open, the Company would submit a revised restructuring proposal to the U.S. Navy consistent with this change. In such event, the Company expects the total estimated restructuring costs would decrease. While the restructuring costs that are currently capitalized as incurred, consisting primarily of severance and retention payments, should remain recoverable under existing or future U.S. Navy contracts, other costs would remain as part of the Avondale cost structure associated with Avondale's new line of business.
	The table below summarizes the changes in the Company's liability for restructuring and shutdown related costs associated with winding down the Avondale facility. As of September 30, 2013 and 2012, these costs were comprised primarily of employee severance and retention payments as well as incentive bonuses. These amounts were capitalized in inventoried costs, and will be recognized as expenses in cost of product sales beginning in 2014.
	($ in millions)
	Balance as of December 31, 2011	$	50
	Payments	(29		)
	Adjustments	9
	Balance as of September 30, 2012	$	30
	Balance as of December 31, 2012	$	24
	Payments	(14		)
	Adjustments	8
	Balance as of September 30, 2013	$	18
	GULFPORT
	On September 3, 2013, the Company approved the closing of its Gulfport Composite Center of Excellence in Gulfport, Mississippi, part of the Ingalls reportable segment, which it intends to complete by May 2014. In connection with this closure, the Company expects to incur total costs of approximately $57 million, consisting primarily of approximately $52 million in accelerated depreciation of fixed assets, $2 million in personnel related costs and $3 million in facility shutdown and other related costs. All but approximately $4 million of the total costs are non-cash, and approximately $13 million of the total costs was recorded in the three and nine months ended September 30, 2013. These costs reduced operating income for the three and nine months ended September 30, 2013 by $17 million, and no material impact on operating income is anticipated in subsequent periods.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	EARNINGS PER SHARE
	The calculation of basic and diluted earnings per common share was as follows:
		Three Months Ended				Nine Months Ended
		30-Sep				30-Sep
	(in millions, except per share amounts)	2013		2012		2013		2012
	Net earnings (loss)	$	69	$	13	$	170	$	96
	Weighted-average common shares outstanding	49.9		49.6		49.9		49.3
	Net effect of dilutive stock options	0.3		0.2		0.3		0.2
	Net effect of dilutive restricted stock rights	0.3		0.2		0.3		0.2
	Net effect of dilutive restricted performance stock rights	0.1		0.3		—		0.2
	Dilutive weighted-average common shares outstanding	50.6		50.3		50.5		49.9
	Earnings (loss) per share - basic	$	1.38	$	0.26	$	3.41	$	1.95
	Earnings (loss) per share - diluted	$	1.36	$	0.26	$	3.37	$	1.92
	The Company's calculation of diluted earnings per common share includes the dilutive effects of the assumed exercise of stock options and vesting of restricted stock based on the treasury stock method. Under this method, the Company has excluded the effects of 0.7 million stock options, 0.3 million Restricted Stock Rights ("RSRs") and 1.3 million Restricted Performance Stock Rights ("RPSRs") from the diluted share amounts presented above for the three months ended September 30, 2013. For the nine months ended September 30, 2013, the Company has excluded the effects of 0.7 million stock options, 0.3 million RSRs and 1.4 million RPSRs from the diluted share amounts presented above. The amounts presented above for the three and nine months ended September 30, 2012, exclude the impact of 1.0 million shares related to stock options, 0.4 million shares related to RSRs and 1.2 million shares related to RPSRs under the treasury stock method.

Segment_Information

Segment Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	The Company is organized into two reportable segments: Ingalls and Newport News. The following table presents segment results for the three and nine months ended September 30, 2013 and 2012:
		Three Months Ended						Nine Months Ended
		30-Sep						30-Sep
	($ in millions)	2013			2012			2013			2012
	Sales and Service Revenues
	Ingalls	$	639		$	670		$	1,942		$	2,118
	Newport News	1,018			944			2,999			2,818
	Intersegment eliminations	(20		)	(18		)	(59		)	(51		)
	Total sales and service revenues	$	1,637		$	1,596		$	4,882		$	4,885
	Operating Income (Loss)
	Ingalls	$	49		$	1		$	110		$	59
	Newport News	93			88			288			258
	Total segment operating income (loss)	142			89			398			317
	Non-segment factors affecting operating income (loss)
	FAS/CAS Adjustment	(13		)	(19		)	(54		)	(55		)
	Deferred state income taxes	(2		)	(4		)	(6		)	(10		)
	Total operating income (loss)	$	127		$	66		$	338		$	252
	FAS/CAS Adjustment - The FAS/CAS Adjustment reflects the difference between expenses for pension and other postretirement benefits determined in accordance with GAAP and the expenses for these items included in segment operating income in accordance with U.S. Cost Accounting Standards ("CAS").

Inventoried_Costs_Net

Inventoried Costs, Net	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Inventoried Costs, Net	'
	INVENTORIED COSTS, NET
	Inventoried costs were composed of the following:
	($ in millions)	September 30			December 31
		2013			2012
	Production costs of contracts in process	$	246		$	198
	General and administrative expenses	2			3
		248			201
	Progress payments received	(1		)	(1		)
		247			200
	Raw material inventory	93			88
	Total inventoried costs, net	$	340		$	288

Goodwill_and_Other_Purchased_I

Goodwill and Other Purchased Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Purchased Intangible Assets	'
	GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS
	Goodwill
	HII performs impairment tests for goodwill as of November 30 of each year and between annual impairment tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the Company's reporting units below their carrying value.
	Accumulated goodwill impairment losses as of both September 30, 2013, and December 31, 2012, were $2,755 million. The accumulated goodwill impairment losses for Ingalls as of both September 30, 2013, and December 31, 2012, were $1,568 million. The accumulated goodwill impairment losses for Newport News as of both September 30, 2013, and December 31, 2012, were $1,187 million.
	Purchased Intangible Assets
	The following table summarizes the Company's aggregate purchased intangible assets, all of which are program related intangible assets.
	($ in millions)	September 30			December 31
		2013			2012
	Gross carrying amount	$	939		$	939
	Accumulated amortization	(407		)	(391		)
	Net carrying amount	$	532		$	548
	The Company's remaining purchased intangible assets are being amortized on a straight-line basis over an aggregate weighted-average period of 40 years. Remaining unamortized intangible assets consist principally of amounts pertaining to nuclear-powered aircraft carrier and submarine program intangibles, whose useful lives have been estimated based on the life cycle of the related programs. Aggregate amortization expense was $5 million for each of the three months ended September 30, 2013 and 2012. Aggregate amortization expense was $16 million and $15 million for the nine months ended September 30, 2013 and 2012, respectively.
	The Company expects amortization for purchased intangibles of approximately $20 million annually for the next five years.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The Company's earnings are entirely domestic and its effective tax rates on earnings from operations for the three months ended September 30, 2013 and 2012, were 30.3% and 64.9%, respectively. For the nine months ended September 30, 2013 and 2012, the Company's effective tax rates were 32.3% and 41.5%, respectively. The 2012 tax rates include the impact of an $8 million unfavorable non-cash tax adjustment arising under the Tax Matters Agreement with Northrop Grumman. The decreases in effective tax rates for the three and nine months ended September 30, 2013, were primarily attributable to an increase in the domestic manufacturing deduction and favorable adjustments related to the true-up of 2012 estimated taxes to actual filed returns.
	For the three and nine months ended September 30, 2013, the Company's effective tax rates differed from the federal statutory rate primarily as a result of the domestic manufacturing deduction, enactment of the American Taxpayer Relief Act in January 2013, and favorable adjustments related to the true-up of 2012 estimated tax expense to actual filed returns. The Company's effective tax rate for the nine months ended September 30, 2013, reflects the entire 2012 income tax benefit for the research and development tax credit, which expired at the end of 2011. The American Taxpayer Relief Act retroactively extended the research and development tax credit through the end of 2013. Due to the timing of enactment, the impact on the Company's effective tax rate for the 2012 credit was reflected in the first quarter of 2013. For the three and nine months ended September 30, 2012, the Company's effective tax rates differed from the federal statutory tax rate primarily as a result of an $8 million non-cash tax adjustment arising under the Tax Matters Agreement with Northrop Grumman. The Tax Matters Agreement requires indemnification for aggregate tax adjustments exceeding a certain threshold for periods prior to the spin-off. See Note 11: Income Taxes in the Company's Annual Report on Form 10-K for the year ended December 31, 2012, for additional information regarding the Tax Matters Agreement. The Company's effective tax rate can also differ from the federal statutory rate as a result of nondeductible expenditures.
	For current state income tax purposes, the stand-alone tax amounts have been computed as if they were allowable costs under the terms of the Company's existing contracts in the applicable period and are included in general and administrative expenses.
	Net deferred tax assets as presented in the unaudited condensed consolidated statements of financial position were as follows:
	($ in millions)	September 30		December 31
		2013		2012
	Net current deferred tax assets	$	218	$	213
	Net non-current deferred tax assets	248		329
	Total net deferred tax assets	$	466	$	542

Debt

Debt	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Debt	'
	Long-term debt consisted of the following:
	($ in millions)	September 30		December 31
		2013		2012
	Term loan due March 30, 2016	$	503	$	525
	Senior notes due March 15, 2018, 6.875%	600		600
	Senior notes due March 15, 2021, 7.125%	600		600
	Mississippi economic development revenue bonds due May 1, 2024, 7.81%	84		84
	Gulf opportunity zone industrial development revenue bonds due December 1, 2028, 4.55%	21		21
	Total long-term debt	1,808		1,830
	Less current portion	65		51
	Long-term debt, net of current portion	$	1,743	$	1,779
	Credit Facility - In connection with the spin-off, the Company entered into the Credit Facility with third-party lenders. The Credit Facility is comprised of a five-year term loan facility of $575 million, which was funded on March 30, 2011, and a revolving credit facility of $650 million, which may be drawn upon during a period of five years from the date of the funding. The revolving credit facility includes a letter of credit subfacility of $350 million, and a swingline loan subfacility of $100 million. The term loan and revolving credit facility have a variable interest rate on outstanding borrowings based on the London Interbank Offered Rate ("LIBOR") plus a spread based upon the Company's leverage ratio. The current spread as of September 30, 2013, was 2.5% and may vary between 2.0% and 3.0%. The revolving credit facility also has a commitment fee rate on the unutilized balance based on the Company's leverage ratio. The current fee rate as of September 30, 2013, was 0.5% and may vary between 0.35% and 0.5%. As of September 30, 2013, approximately $32 million in letters of credit were issued but undrawn, and the remaining $618 million was unutilized.
	The term loan facility is subject to amortization in three-month intervals from the funding date, expected to be in an aggregate amount equal to 5% during each of the first year and the second year, 10% during the third year, 15% during the fourth year, and 65% during the fifth year, of which 5% is payable on each of the first three quarterly payment dates during such year, and the balance is payable on the term maturity date.
	Senior Notes - In connection with the spin-off, the Company issued $600 million aggregate principal amount of 6.875% senior notes due March 15, 2018, and $600 million aggregate principal amount of 7.125% senior notes due March 15, 2021.
	Mississippi Economic Development Revenue Bonds - As of September 30, 2013, the Company had $84 million outstanding under Industrial Revenue Bonds issued by the Mississippi Business Finance Corporation. These bonds accrue interest at a fixed rate of 7.81% per annum (payable semi-annually) and mature in 2024.
	Gulf Opportunity Zone Industrial Development Revenue Bonds - As of September 30, 2013, the Company had $21 million outstanding under Gulf Opportunity Zone Industrial Development Revenue Bonds issued by the Mississippi Business Finance Corporation. These bonds accrue interest at a fixed rate of 4.55% per annum (payable semi-annually) and mature in 2028.
	The Company's debt arrangements contain customary affirmative and negative covenants, including a maximum total leverage ratio and a minimum interest coverage ratio. The Company was in compliance with all debt covenants during the nine months ended September 30, 2013.
	The estimated fair value of the Company's total long-term debt, including current portions, as of September 30, 2013 and December 31, 2012, was $1,943 million and $1,974 million, respectively. The fair value of the Company's long-term debt was calculated based on either recent trades of the Company's debt instruments in inactive markets or yields available on debt with substantially similar risks, terms and maturities, which fall within Level 2 under the fair value hierarchy.

Business_Arrangements

Business Arrangements	9 Months Ended
	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Business Arrangements	'
	BUSINESS ARRANGEMENTS
	HII periodically enters into business arrangements with non-affiliated entities. These arrangements generally consist of business ventures designed to deliver collective capabilities that would not have been available to the venture's participants individually, and provide a single point of contact during contract performance to the entity's principal customer. In some arrangements, each equity participant receives a subcontract from the business venture for a pre-determined scope of work. In other cases, the arrangements rely primarily on the assignment of key personnel to the venture from each equity participant rather than subcontracts for a specific work scope. Based on the terms of these arrangements and the relevant GAAP related to consolidation accounting for such entities, the Company does not consolidate the financial position, results of operations or cash flows of these entities into its unaudited condensed consolidated financial statements, but accounts for them under the equity method. To the extent HII acts as a subcontractor in these arrangements, HII's subcontract activities are recorded in the same manner as sales to non-affiliated entities.
	In May 2007, the Company signed a joint venture agreement with Fluor Federal Services, Inc. and Honeywell International Inc. for a nominal initial investment, whereby Savannah River Nuclear Solutions, LLC ("SRNS") was formed to manage and operate the Savannah River Site for the Department of Energy and the National Nuclear Security Administration. As of September 30, 2013, and December 31, 2012, the Company's ownership interest was approximately 34%, with carrying amounts of $12 million and $4 million, respectively. The investment in SRNS is being accounted for using the equity method and the total investment is classified as miscellaneous other assets in the Company's unaudited condensed consolidated statements of financial position. During the nine months ended September 30, 2013 and 2012, the Company received cash dividends from SRNS of $6 million and $9 million, respectively, which were recorded as reductions in the Company's investment in SRNS.
	The following table presents summarized financial information for the Company's equity method investments:
	Results of Operations
		Three Months Ended				Nine Months Ended
		30-Sep				30-Sep
	($ in millions)	2013		2012		2013		2012
	Sales and services revenues	$	292	$	359	$	796	$	1,024
	Operating income	27		20		39		37
	Net earnings	27		20		39		37

Investigations_Claims_and_Liti

Investigations, Claims, and Litigation	9 Months Ended
	Sep. 30, 2013
Investigations, Claims, And Litigation [Abstract]	'
Investigations, Claims, And Litigation	'
	INVESTIGATIONS, CLAIMS, AND LITIGATION
	The Company is involved in legal proceedings before various courts and administrative agencies, and is periodically subject to government examinations, inquiries and investigations. Pursuant to FASB Accounting Standards Codification 450 Contingencies, the Company has accrued for losses associated with investigations, claims and litigation when, and to the extent that, loss amounts related to the investigations, claims and litigation are probable and can be reasonably estimated. The actual losses that might be incurred to resolve such investigations, claims and litigation may be higher or lower than the amounts accrued. For matters where a material loss is probable or reasonably possible and the amount of loss cannot be reasonably estimated, but the Company is able to reasonably estimate a range of possible losses, the Company will disclose such estimated range in these notes. This estimated range is based on information currently available to the Company and involves elements of judgment and significant uncertainties. This estimated range of possible loss does not represent the Company's maximum possible loss exposure. For matters as to which the Company is not able to reasonably estimate a possible loss or range of loss, the Company is required to indicate the reasons why it is unable to estimate the possible loss or range of loss. For matters not specifically described in these notes, the Company does not believe, based on information currently available to it, that it is reasonably possible that the liabilities, if any, arising from such investigations, claims and litigation will have a material effect on its consolidated financial position, results of operations or cash flows. The Company has, in certain cases, provided disclosure regarding certain matters for which the Company believes at this time that the likelihood of material loss is remote.
	False Claims Act Complaint - In January 2011, the U.S. Department of Justice ("DoJ") first informed the Company through Northrop Grumman of a False Claims Act complaint (the "Complaint") that was filed under seal in the U.S. District Court for the District of Columbia. The redacted copy of the Complaint the Company received alleges that, through largely unspecified fraudulent means, the Company and Northrop Grumman obtained federal funds that were restricted by law for the consequences of Hurricane Katrina, and used those funds to cover costs under certain shipbuilding contracts that were unrelated to Katrina and for which Northrop Grumman and the Company were not entitled to recovery under the contracts. The Complaint seeks monetary damages of at least $835 million, plus penalties, attorneys' fees and other costs of suit. Damages under the False Claims Act may be trebled upon a finding of liability.
	In July 2012, the District Court entered an order permitting the Company to disclose certain information not included in the redacted copy of the Complaint received by the Company, including the date the Complaint was filed, the decision of the DoJ to decline intervention in the case, and the principal parties involved in the case. The Complaint was filed on June 2, 2010, by relators Gerald M. Fisher and Donald C. Holmes. On December 8, 2011, the DoJ filed a Notice of Election to Decline Intervention in the case. As of August 29, 2012, Gerald M. Fisher was no longer a relator in or party to this case. On February 28, 2013, the U.S. District Court for the District of Columbia granted the defendants' motion to transfer venue, and the case was transferred to the U.S. District Court for the Southern District of Mississippi. The Company has filed a motion to dismiss the case and a motion to disqualify relator Holmes, and all other matters are stayed pending resolution of the motion to dismiss.
	Based upon a review to date of the information available to the Company, the Company believes that it has substantive defenses to the allegations in the Complaint, that the claims as set forth in the Complaint evidence a fundamental lack of understanding of the terms and conditions in the Company's shipbuilding contracts, including the post-Katrina modifications to those contracts, and the manner in which the parties performed in connection with the contracts, and that the claims as set forth in the Complaint lack merit. The Company, therefore, believes that the claims as set forth in the Complaint will not result in a material effect on its consolidated financial position, results of operations or cash flows. The Company intends to defend the matter vigorously, but the Company cannot predict what new or revised claims might be asserted or what information might come to light and can, therefore, give no assurances regarding the ultimate outcome.
	U.S. Government Investigations and Claims - Departments and agencies of the U.S. Government have the authority to investigate various transactions and operations of the Company, and the results of such investigations may lead to administrative, civil or criminal proceedings, the ultimate outcome of which could be fines, penalties, repayments or compensatory or treble damages. U.S. Government regulations provide that certain findings against a contractor may lead to suspension or debarment from future U.S. Government contracts or the loss of export privileges for a company or an operating division or subdivision. Any suspension or debarment would likely have a material effect on the Company because of its reliance on government contracts.
	In January 2013, the Company disclosed to the DoD, including the U.S. Navy, and the U.S. Department of Homeland Security, including the U.S. Coast Guard, pursuant to the FAR, that it had initiated an internal investigation regarding whether certain employees at Ingalls mischarged time or misstated progress on U.S. Navy and U.S. Coast Guard contracts. The Company conducted an internal investigation, led by external counsel, and has taken remedial actions, including the termination of employees in instances where the Company believed grounds for termination existed. The Company is providing information regarding its investigation to the relevant government agencies. The Company agreed with the U.S. Navy and U.S. Coast Guard that they would initially withhold $24 million in payments on existing contracts pending receipt of additional information from the Company's internal investigation. In November 2013, the U.S. Navy informed the Company that it intended to reduce its portion of the withhold from $18.2 million to $13.1 million, and noted its view that the gross amount of potential mischarging may be $5.3 million. Based on the results of its internal investigation, the Company estimates that the maximum amount of the mischarging is approximately $4 million. The Company is in discussions with its U.S. Government customers regarding the potential release of an additional portion of the withheld funds, but it cannot predict whether these customers will agree to a lower withhold amount. Depending upon the U.S. Government's assessment of the matters under investigation, the Company could be subject to significant civil penalties, criminal fines, and suspension or debarment from U.S. Government contracting. Although the Company does not currently believe that this matter will have a material effect on its financial condition, results of operations or cash flows, the Company cannot predict what new information might come to light in the future and can therefore give no assurances regarding the ultimate outcome of this matter.
	Asbestos Related Claims - HII and its predecessors-in-interest are defendants in a longstanding series of cases filed in numerous jurisdictions around the country, wherein former and current employees and various third-party persons allege exposure to asbestos containing materials while on or associated with HII premises or while working on vessels constructed or repaired by HII. The cases allege various injuries, including those associated with pleural plaque disease, asbestosis, cancer, mesothelioma and other alleged asbestos related conditions. In some cases, several of HII's former executive officers are also named as defendants. In some instances, partial or full insurance coverage is available to the Company for its liability and that of its former executive officers. Although the Company believes the ultimate resolution of these cases will not have a material effect on its consolidated financial position, results of operations or cash flows, it cannot predict what new or revised claims or litigation might be asserted or what information might come to light and can, therefore, give no assurances regarding the ultimate outcome of asbestos related litigation.
	Litigation - The Company is party to various claims and legal proceedings that arise in the ordinary course of business. Although the Company believes that the resolution of any of these various claims and legal proceedings will not have a material effect on its consolidated financial position, results of operations or cash flows, it cannot predict what new or revised claims or litigation might be asserted or what information might come to light and can, therefore, give no assurances regarding the ultimate outcome of these matters.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Contract Performance Contingencies - Contract profit margins may include estimates of revenues not contractually agreed to between the customer and the Company for matters such as settlements in the process of negotiation, contract changes, claims and requests for equitable adjustment for previously unanticipated contract costs. These estimates are based upon management's best assessment of the underlying causal events and circumstances, and are included in determining contract profit margins to the extent of expected recovery based on contractual entitlements and the probability of successful negotiation with the customer. As of September 30, 2013, the recognized amounts related to claims and requests for equitable adjustment are not material individually or in aggregate.
	Guarantees of Performance Obligations - From time to time in the ordinary course of business, HII may enter into joint ventures, teaming and other business arrangements to support the Company's products and services as described in Note 12: Business Arrangements. The Company generally strives to limit its exposure under these arrangements to its investment in the arrangement, or to the extent of obligations under the applicable contract. In some cases, however, HII may be required to guarantee performance of the arrangement and, in such cases, generally obtains cross-indemnification from the other members of the arrangement. As of September 30, 2013, the Company was not aware of any existing event of default that would require HII to satisfy any of these guarantees.
	Environmental Matters -The estimated cost to complete environmental remediation has been accrued where it is probable that the Company will incur such costs in the future to address environmental conditions at currently or formerly owned or leased operating facilities, or at sites where it has been named a Potentially Responsible Party ("PRP") by the Environmental Protection Agency, or similarly designated by another environmental agency, and these costs can be estimated by management. These accruals do not include any litigation costs related to environmental matters, nor do they include amounts recorded as asset retirement obligations. To assess the potential impact on the Company's consolidated financial statements, management estimates the range of reasonably possible remediation costs that could be incurred by the Company, taking into account currently available facts on each site as well as the current state of technology and prior experience in remediating contaminated sites. These estimates are reviewed periodically and adjusted to reflect changes in facts and technical and legal circumstances. Management estimates that as of September 30, 2013, the probable future cost for environmental remediation is $2 million, which is accrued in other current liabilities. Factors that could result in changes to the Company's estimates include: modification of planned remedial actions, increases or decreases in the estimated time required to remediate, changes to the determination of legally responsible parties, discovery of more extensive contamination than anticipated, changes in laws and regulations affecting remediation requirements, and improvements in remediation technology. Should other PRPs not pay their allocable share of remediation costs, the Company may have to incur costs exceeding those already estimated and accrued. In addition, there are certain potential remediation sites where the costs of remediation cannot be reasonably estimated. Although management cannot predict whether new information gained as projects progress will materially affect the estimated liability accrued, management does not believe that future remediation expenditures will have a material effect on the Company's consolidated financial position, results of operations or cash flows.
	Financial Arrangements - In the ordinary course of business, HII uses standby letters of credit issued by commercial banks and surety bonds issued by insurance companies principally to support the Company's self-insured workers' compensation plans. As of September 30, 2013, the Company had $32 million in standby letters of credit issued but undrawn and $352 million of surety bonds outstanding.
	U.S. Government Claims - From time to time, the U.S. Government advises the Company of claims and penalties concerning certain potential disallowed costs. When such findings are presented, the Company and U.S. Government representatives engage in discussions to enable HII to evaluate the merits of these claims as well as to assess the amounts being claimed. The Company does not believe that the outcome of any such matters will have a material effect on its consolidated financial position, results of operations, or cash flows.

Impacts_From_Hurricanes

Impacts From Hurricanes	9 Months Ended
	Sep. 30, 2013
Extraordinary and Unusual Items [Abstract]	'
Impacts From Hurricanes	'
	IMPACTS FROM HURRICANES
	In August 2005, the Company's Ingalls operations were significantly impacted by Hurricane Katrina, and the Company's shipyards in Louisiana and Mississippi sustained significant windstorm damage from the hurricane. As a result of the storm, the Company incurred costs to replace or repair destroyed or damaged assets, suffered losses under its contracts, and incurred substantial costs to clean up and recover its operations. At the time of the storm, the Company had a comprehensive insurance program that provided coverage for, among other things, property damage, business interruption impact on net profitability, and costs associated with clean-up and recovery. The Company recovered a portion of its Hurricane Katrina claim from certain of its participating program insurers in prior periods. In the third quarter of 2013, the Company resolved litigation against its remaining insurer, Factory Mutual Insurance Company ("FM Global"), resulting in a total recovery from its insurers of $677.5 million for its Hurricane Katrina claim, including $180 million from FM Global.
	The Company’s predecessor-in-interest commenced litigation against FM Global on November 4, 2005 in California Superior Court and was removed to the U.S. District Court for the Central District of California, Western Division. In an interlocutory appeal, the U.S. Court of Appeals for the Ninth Circuit held that the FM Global excess policy unambiguously excluded damage from the storm surge caused by Hurricane Katrina under its "Flood" exclusion and remanded the case to the U.S. District Court to determine whether the California efficient proximate cause doctrine afforded coverage under the policy, even if the Flood exclusion of the policy was unambiguous. In August 2010, the U.S. District Court granted FM Global's motion for summary judgment based upon California's doctrine of efficient proximate cause and denied FM Global's motion for summary judgment based upon breach of contract, finding that triable issues of fact remained as to whether and to what extent the Company sustained wind damage apart from the hurricane storm surge. In July 2011, the U.S. District Court held that the flood sublimit in the primary layer applies only to property damage loss, not to time element loss. In September 2011, the U.S. District Court granted FM Global's motion for summary judgment to dismiss the claims for bad faith damages and for contract reformation. In July 2013, the U.S. District Court issued an order regarding the parties’ cross-motions for summary judgment.  Among other things, it held that there were material issues of disputed fact warranting a trial by jury. On September 6, 2013, the Company and FM Global entered into a settlement agreement, pursuant to which FM Global made a cash payment of $180 million to the Company and the Company agreed to release its claim against FM Global.
	In January 2011, the Company, through a predecessor-in-interest, filed suit in Superior Court in California against Aon Risk Insurance Services West, Inc. ("Aon"), which acted as broker to the predecessor-in-interest in connection with the policy with FM Global, seeking damages for breach of contract, professional negligence and negligent misrepresentation, as well as declaratory relief. Those damages include over $200 million in damages unrecovered from FM Global plus costs, legal fees and expenses incurred in the lawsuit against FM Global, as well as interest. The Company intends to continue pursuing its claims against Aon. No assurances can be provided as to the ultimate outcome of the matter. If, however, the claims are successful, the potential impact to the Company's consolidated financial position, results of operations and cash flows would be favorable.
	In February 2013, the Company submitted a certified claim requesting a final decision on the allowability and allocability of certain post-Katrina depreciation and other Katrina-related expenses and on the apportionment of insurance proceeds. In October 2013, the Company received a Contracting Officer's Final Decision ("COFD") disallowing certain post-Katrina depreciation costs and other Katrina-related expenses, as well as providing direction on the apportionment of Katrina-related insurance recoveries. The Company has the right to appeal the COFD and is currently evaluating its options.
	In the third quarter of 2013, the Company recorded a $46 million favorable impact to operating income from hurricane insurance recoveries and as a result of customer direction on the apportionment of Katrina-related insurance recovery discussed above.

Employee_Pension_And_Other_Pos

Employee Pension And Other Postretirement Benefits	9 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Employee Pension and Other Postretirement Benefits	'
	EMPLOYEE PENSION AND OTHER POSTRETIREMENT BENEFITS
	The Company provides defined benefit pension and postretirement benefit plans and defined contribution pension benefit plans to eligible employees.
	The cost of the Company's defined benefit plans and other postretirement plans for the three and nine months ended September 30, 2013 and 2012, was as follows:
		Three Months Ended												Nine Months Ended
		30-Sep												30-Sep
		Pension Benefits						Other Benefits						Pension Benefits						Other Benefits
	($ in millions)	2013			2012			2013			2012			2013			2012			2013			2012
	Components of Net Periodic Benefit Cost
	Service cost	$	37		$	33		$	5		$	4		$	110		$	99		$	16		$	12
	Interest cost	54			53			8			9			161			159			26			27
	Expected return on plan assets	(72		)	(67		)	—			—			(216		)	(200		)	—			—
	Amortization of prior service cost (credit)	4			3			(7		)	(2		)	13			9			(14		)	(7		)
	Amortization of net actuarial loss (gain)	29			19			4			3			88			58			12			8
	Net periodic benefit cost	$	52		$	41		$	10		$	14		$	156		$	125		$	40		$	40
	The Company's cash contributions for the nine months ended September 30, 2013 and 2012, were as follows:
		Nine Months Ended
		30-Sep
	($ in millions)	2013			2012
	Pension plans
	Qualified minimum	$	—		$	143
	Discretionary
	Qualified	301			87
	Non-qualified	3			3
	Other benefit plans	26			25
	Total contributions	$	330		$	258
	As of September 30, 2013, the Company anticipates no further cash contributions to its qualified defined benefit pension plans in 2013. For the year ending December 31, 2013, the Company expects its cash contributions to its qualified defined benefit pension plans to be $301 million, all of which will be discretionary.
	In March 2013, the Company concluded negotiations on one of its collective bargaining agreements, which required an amendment to one of the Company's pension plans. As a result of the amendment, the remeasurement of the plan increased the pension liability and pre-tax accumulated other comprehensive loss by approximately $30 million.
	In May 2013, the Company amended its postretirement benefit plan for salaried post-65 participants, which replaced a Company-sponsored indemnity plan with coverage offered through a third-party vendor and permanently capped the Company's contributions. As a result of the amendment, the remeasurement of the plan decreased the postretirement liability and pre-tax accumulated other comprehensive loss by approximately $177 million.
	Other comprehensive income (loss) refers to gains and losses recorded as an element of stockholders' equity but excluded from net earnings (loss). The accumulated other comprehensive loss as of September 30, 2013, and December 31, 2012, was comprised of unamortized benefit plan costs of $1,080 million and $2 million of other items (net of tax benefits of $701 million) and unamortized benefit plan costs of $1,226 million (net of tax benefits of $802 million), respectively. The changes in accumulated other comprehensive income (loss) by component, net of tax, for the three and nine months ended September 30, 2013, were as follows:
	($ in millions)	Benefit Plans			Other			Total
	Balance as of June 30, 2013	$	(1,097	)	$	1		$	(1,096	)
	Other comprehensive income before reclassifications	—			1			1
	Amounts reclassified from accumulated other comprehensive income (loss)
	Amortization of prior service credit (cost)	(2		)	—			(2		)
	Amortization of actuarial gain (loss)	19			—			19
	Net current period other comprehensive income (loss)	17			1			18
	Balance as of September 30, 2013	$	(1,080	)	$	2		$	(1,078	)
	($ in millions)	Benefit Plans			Other			Total
	Balance as of December 31, 2012	$	(1,226	)	$	—		$	(1,226	)
	Other comprehensive income before reclassifications	87			2			89
	Amounts reclassified from accumulated other comprehensive income (loss)
	Amortization of prior service credit (cost)	(1		)	—			(1		)
	Amortization of actuarial gain (loss)	60			—			60
	Net current period other comprehensive income (loss)	146			2			148
	Balance as of September 30, 2013	$	(1,080	)	$	2		$	(1,078	)

Stock_Compensation_Plans

Stock Compensation Plans	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Compensation Plans	'
	STOCK COMPENSATION PLANS
	The following table summarizes the status of the Company's stock option awards as of September 30, 2013:
		Shares Under	Weighted-		Weighted- Average	Aggregate
		Option	Average		Remaining	Intrinsic
		(in thousands)	Exercise Price		Contractual Term	Value
					(in years)	($ in millions)
	Outstanding and exercisable at September 30, 2013	849	$	36.27	2.3	$	28
	During the nine months ended September 30, 2013, the Company issued new equity awards as follows:
	Restricted Performance Stock Rights - On February 19, 2013, the Company granted approximately 0.4 million RPSRs at a share price of $45.54. These rights are subject to cliff vesting based on service over two years, ten months from the date of grant. The RPSRs are subject to the achievement of performance-based targets at the end of the vesting period. Based upon the Company's results measured against such targets, between 0% and 200% of the original stated grants are expected to ultimately vest.
	The following table summarizes the status of the Company's outstanding stock awards as of September 30, 2013:
		Stock Awards	Weighted-Average		Weighted-Average Remaining Contractual Term
		(in thousands)	Grant Date Fair		(in years)
			Value
	Total stock awards	2,133	$	41.33	1.1
	Compensation Expense
	The Company recorded stock-based compensation for the value of awards granted to Company employees and non-employee members of the board of directors for each of the three months ended September 30, 2013 and 2012, of $9 million. For the nine months ended September 30, 2013 and 2012, stock-based compensation was $28 million and $25 million, respectively.
	The Company recognized tax benefits for stock-based compensation in the unaudited condensed consolidated statements of operations for the three months ended September 30, 2013 and 2012, of $4 million and $3 million, respectively. Tax benefits for stock-based compensation recognized for the nine months ended September 30, 2013 and 2012, were $11 million and $10 million, respectively.
	Unrecognized Compensation Expense
	As of September 30, 2013, the Company had $4 million of unrecognized compensation expense associated with the RSRs granted in 2011, which will be recognized over a period of 0.5 years, and $35 million of unrecognized expense associated with the RPSRs granted in 2013, 2012 and 2011, which will be recognized over a weighted average period of 1.3 years.

Subsidiary_Guarantors

Subsidiary Guarantors	9 Months Ended
	Sep. 30, 2013
Subsidiary Guarantors [Abstract]	'
Subsidiary Guarantors	'
	Performance of the Company's obligations under the senior notes, including any repurchase obligations resulting from a change of control, is unconditionally guaranteed, jointly and severally, on an unsecured basis, by each of HII's existing and future domestic restricted subsidiaries that guarantees debt under the Credit Facility (the "Subsidiary Guarantors"). The guarantees rank equally with all other unsecured and unsubordinated indebtedness of the Subsidiary Guarantors. The Subsidiary Guarantors are each directly or indirectly 100% owned by HII.
	Set forth below are the unaudited condensed consolidating statements of operations and comprehensive income for the three and nine months ended September 30, 2013 and 2012, unaudited condensed consolidating statements of financial position as of September 30, 2013, and December 31, 2012, and the unaudited condensed consolidating statements of cash flows for the nine months ended September 30, 2013 and 2012, for HII, its aggregated subsidiary guarantors and its aggregated non-guarantor subsidiaries:
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
		Three Months Ended September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	1,394		$	—	$	—		$	1,394
	Service revenues	—			243			6		(6		)	243
	Total sales and service revenues	—			1,637			6		(6		)	1,637
	Cost of sales and service revenues
	Cost of product sales	—			1,123			—		—			1,123
	Cost of service revenues	—			210			6		(6		)	210
	Income (loss) from operating investments, net	—			9			—		—			9
	General and administrative expenses	—			186			—		—			186
	Operating income (loss)	—			127			—		—			127
	Interest expense	(26		)	(2		)	—		—			(28		)
	Equity in earnings (loss) of subsidiaries	87			—			—		(87		)	—
	Earnings (loss) before income taxes	61			125			—		(87		)	99
	Federal income taxes	(8		)	38			—		—			30
	Net earnings (loss)	$	69		$	87		$	—	$	(87	)	$	69
	Other comprehensive income (loss), net of tax	18			18			—		(18		)	18
	Comprehensive income (loss)	$	87		$	105		$	—	$	(105	)	$	87
		Three Months Ended September 30, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	1,367		$	—	$	—		$	1,367
	Service revenues	—			229			6		(6		)	229
	Total sales and service revenues	—			1,596			6		(6		)	1,596
	Cost of sales and service revenues
	Cost of product sales	—			1,187			—		—			1,187
	Cost of service revenues	—			186			6		(6		)	186
	Income (loss) from operating investments, net	—			7			—		—			7
	General and administrative expenses	—			164			—		—			164
	Operating income (loss)	—			66			—		—			66
	Interest expense	(28		)	(1		)	—		—			(29		)
	Equity in earnings (loss) of subsidiaries	31			—			—		(31		)	—
	Earnings (loss) before income taxes	3			65			—		(31		)	37
	Federal income taxes	(10		)	34			—		—			24
	Net earnings (loss)	$	13		$	31		$	—	$	(31	)	$	13
	Other comprehensive income (loss), net of tax	17			17			—		(17		)	17
	Comprehensive income (loss)	$	30		$	48		$	—	$	(48	)	$	30
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
		Nine Months Ended September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	4,138		$	—	$	—		$	4,138
	Service revenues	—			744			17		(17		)	744
	Total sales and service revenues	—			4,882			17		(17		)	4,882
	Cost of sales and service revenues
	Cost of product sales	—			3,366			—		—			3,366
	Cost of service revenues	—			650			17		(17		)	650
	Income (loss) from operating investments, net	—			13			—		—			13
	General and administrative expenses	—			541			—		—			541
	Operating income (loss)	—			338			—		—			338
	Interest expense	(81		)	(6		)	—		—			(87		)
	Equity in earnings (loss) of subsidiaries	225			—			—		(225		)	—
	Earnings (loss) before income taxes	144			332			—		(225		)	251
	Federal income taxes	(26		)	107			—		—			81
	Net earnings (loss)	$	170		$	225		$	—	$	(225	)	$	170
	Other comprehensive income (loss), net of tax	148			148			—		(148		)	148
	Comprehensive income (loss)	$	318		$	373		$	—	$	(373	)	$	318
		Nine Months Ended September 30, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Sales and service revenues
Product sales	$	—		$	4,224		$	—	$	—		$	4,224
Service revenues	—			661			13		(13		)	661
Total sales and service revenues	—			4,885			13		(13		)	4,885
Cost of sales and service revenues
Cost of product sales	—			3,578			—		—			3,578
Cost of service revenues	—			562			13		(13		)	562
Income (loss) from operating investments, net	—			13			—		—			13
General and administrative expenses	—			506			—		—			506
Operating income (loss)	—			252			—		—			252
Interest expense	(83		)	(5		)	—		—			(88		)
Equity in earnings (loss) of subsidiaries	149			—			—		(149		)	—
Earnings (loss) before income taxes	66			247			—		(149		)	164
Federal income taxes	(30		)	98			—		—			68
Net earnings (loss)	$	96		$	149		$	—	$	(149	)	$	96
Other comprehensive income (loss), net of tax	45			45			—		(45		)	45
Comprehensive income (loss)	$	141		$	194		$	—	$	(194	)	$	141
CONDENSED CONSOLIDATING STATEMENTS OF FINANCIAL POSITION
	September 30, 2013
($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current Assets
Cash and cash equivalents	$	894		$	—		$	1	$	—		$	895
Accounts receivable, net	—			1,055			—		—			1,055
Inventoried costs, net	—			340			—		—			340
Deferred income taxes	—			218			—		—			218
Prepaid expenses and other current assets	—			24			11		(12		)	23
Total current assets	894			1,637			12		(12		)	2,531
Property, plant, and equipment, net	—			1,964			—		—			1,964
Goodwill	—			881			—		—			881
Other purchased intangibles, net	—			532			—		—			532
Miscellaneous other assets	33			338			—		—			371
Investment in subsidiaries	2,618			—			—		(2,618		)	—
Intercompany receivables	—			899			—		(899		)	—
Total assets	$	3,545		$	6,251		$	12	$	(3,529	)	$	6,279
Liabilities and Stockholders' Equity
Current Liabilities
Trade accounts payable	$	—		$	287		$	—	$	—		$	287
Accrued employees’ compensation	—			205			—		—			205
Current portion of long-term debt	65			—			—		—			65
Current portion of postretirement plan liabilities	—			148			—		—			148
Current portion of workers’ compensation liabilities	—			225			—		—			225
Advance payments and billings in excess of revenues	—			139			—		—			139
Other current liabilities	8			325			12		(12		)	333
Total current liabilities	73			1,329			12		(12		)	1,402
Long-term debt	1,638			105			—		—			1,743
Pension plan liabilities	—			1,082			—		—			1,082
Other postretirement plan liabilities	—			656			—		—			656
Workers’ compensation liabilities	—			409			—		—			409
Other long-term liabilities	—			52			—		—			52
Intercompany liabilities	899			—			—		(899		)	—
Total liabilities	2,610			3,633			12		(911		)	5,344
Stockholders’ equity	935			2,618			—		(2,618		)	935
Total liabilities and stockholders’ equity	$	3,545		$	6,251		$	12	$	(3,529	)	$	6,279
CONDENSED CONSOLIDATING STATEMENTS OF FINANCIAL POSITION
	December 31, 2012
($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current Assets
Cash and cash equivalents	$	1,056		$	—		$	1	$	—		$	1,057
Accounts receivable, net	—			905			—		—			905
Inventoried costs, net	—			288			—		—			288
Deferred income taxes	—			213			—		—			213
Prepaid expenses and other current assets	—			22			4		(5		)	21
Total current assets	1,056			1,428			5		(5		)	2,484
Property, plant, and equipment, net	—			2,034			—		—			2,034
Goodwill	—			881			—		—			881
Other purchased intangibles, net	—			548			—		—			548
Miscellaneous other assets	39			406			—		—			445
Investment in subsidiaries	2,282			—			—		(2,282		)	—
Intercompany receivables	—			960			—		(960		)	—
Total assets	$	3,377		$	6,257		$	5	$	(3,247	)	$	6,392
Liabilities and Stockholders' Equity
Current Liabilities
Trade accounts payable	$	—		$	377		$	—	$	—		$	377
Accrued employees’ compensation	—			235			—		—			235
Current portion of long-term debt	51			—			—		—			51
Current portion of postretirement plan liabilities	—			166			—		—			166
Current portion of workers’ compensation liabilities	—			216			—		—			216
Advance payments and billings in excess of revenues	—			134			—		—			134
Other current liabilities	25			180			5		(5		)	205
Total current liabilities	76			1,308			5		(5		)	1,384
Long-term debt	1,674			105			—		—			1,779
Pension plan liabilities	—			1,301			—		—			1,301
Other postretirement plan liabilities	—			799			—		—			799
Workers’ compensation liabilities	—			403			—		—			403
Other long-term liabilities	—			59			—		—			59
Intercompany liabilities	960			—			—		(960		)	—
Total liabilities	2,710			3,975			5		(965		)	5,725
Stockholders’ equity	667			2,282			—		(2,282		)	667
Total liabilities and stockholders’ equity	$	3,377		$	6,257		$	5	$	(3,247	)	$	6,392
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Nine Months Ended September 30, 2013
($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net cash provided by (used in) operating activities	$	(73	)	$	17		$	—	$	—		$	(56	)
Investing Activities
Additions to property, plant, and equipment	—			(85		)	—		—			(85		)
Proceeds from insurance settlement	—			58			—		—			58
Net cash provided by (used in) investing activities	—			(27		)	—		—			(27		)
Financing Activities
Repayment of long-term debt	(22		)	—			—		—			(22		)
Dividends paid	(15		)	—			—		—			(15		)
Repurchases of common stock	(53		)	—			—		—			(53		)
Proceeds from stock option exercises	6			—			—		—			6
Excess tax benefit related to stock-based compensation	—			5			—		—			5
Cash sweep/funding by parent	(5		)	5			—		—			—
Net cash provided by (used in) financing activities	(89		)	10			—		—			(79		)
Change in cash and cash equivalents	(162		)	—			—		—			(162		)
Cash and cash equivalents, beginning of period	1,056			—			1		—			1,057
Cash and cash equivalents, end of period	$	894		$	—		$	1	$	—		$	895
	Nine Months Ended September 30, 2012
($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net cash provided by (used in) operating activities	$	(76	)	$	34		$	1	$	—		$	(41	)
Investing Activities
Additions to property, plant, and equipment	—			(92		)	—		—			(92		)
Net cash provided by (used in) investing activities	—			(92		)	—		—			(92		)
Financing Activities
Repayment of long-term debt	(22		)	—			—		—			(22		)
Proceeds from stock option exercises	6			—			—		—			6
Cash sweep/funding by parent	(58		)	58			—		—			—
Net cash provided by (used in) financing activities	(74		)	58			—		—			(16		)
Change in cash and cash equivalents	(150		)	—			1		—			(149		)
Cash and cash equivalents, beginning of period	915			—			—		—			915
Cash and cash equivalents, end of period	$	765		$	—		$	1	$	—		$	766

Subsequent_Events_Notes

Subsequent Events (Notes)	9 Months Ended
	Sep. 30, 2013
Subsequent Event [Line Items]	'
Subsequent Events [Text Block]	'
	SUBSEQUENT EVENT
	On November 6, 2013, the Company amended and restated its existing Credit Facility. The amended and restated Credit Facility includes a term loan in the amount of $489 million, which was the amount of term loan outstanding under the prior Credit Facility, and a revolving credit facility of $650 million, with a letter of credit subfacility of $350 million and a swingline loan subfacility of $100 million, which are unchanged from the prior Credit Facility. The amended and restated Credit Facility contains more favorable pricing terms than the Company’s prior Credit Facility and provides more flexibility under the Credit Facility’s restricted payment covenants. The amended and restated Credit Facility otherwise contains materially the same terms and conditions as the prior Credit Facility. The amended and restated Credit Facility does not increase the amount of available credit under the Company’s Credit Facility, and the existing amortization schedule was not modified.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation - The unaudited condensed consolidated financial statements of HII and its subsidiaries have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP") and the instructions to Form 10-Q promulgated by the Securities and Exchange Commission ("SEC"). All intercompany transactions and balances are eliminated in consolidation. For classification of current assets and liabilities related to its long-term production contracts, the Company uses the duration of these contracts as its operating cycle, which is generally longer than one year. Additionally, certain prior year amounts have been reclassified to conform to the current year presentation.
Fiscal Period Policy	'
	The quarterly information is labeled using a calendar convention; that is, first quarter is consistently labeled as ending on March 31, second quarter as ending on June 30, and third quarter as ending on September 30. It is management's long-standing practice to establish interim closing dates using a "fiscal" calendar, which requires the businesses to close their books on a Friday near these quarter-end dates in order to normalize the potentially disruptive effects of quarterly closings on business processes. The effects of this practice only exist for interim periods within a reporting year.
Equity	'
	Equity - On each of March 15, 2013, June 14, 2013, and September 13, 2013, the Company paid quarterly cash dividends of $0.10 per share, which totaled $15 million year-to-date. During 2012, the Company's board of directors authorized a program to repurchase up to $150 million of the Company's common stock over three years. On October 30, 2013, the Company's board of directors authorized an increase in the stock repurchase program from $150 million to $300 million and an extension of the term of the program from October 31, 2015, to October 31, 2017. Purchases under the stock repurchase program may be made from time to time in the discretion of management in the open market, through privately negotiated transactions or through other means, are subject to prevailing market conditions and other factors, and may be suspended or discontinued at any time. For the nine months ended September 30, 2013, the Company repurchased 919,866 shares at a cost of $56 million, which is recorded as treasury stock in the unaudited condensed consolidated statements of financial position.
Accounting Estimates	'
	Accounting Estimates - The preparation of the Company's unaudited condensed consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Estimates have been prepared on the basis of the most current and best available information and actual results could differ materially from those estimates.
	The Budget Control Act of 2011 will result in significant decreases in DoD spending starting in 2013, which could negatively impact the Company's revenues and its estimated recovery of goodwill and other long-lived assets.
	The Company recognizes changes in estimates of contract sales, costs and profits using the cumulative catch-up method of accounting. This method recognizes in the current period the cumulative effect of the changes on current and prior periods. Hence, the effect of the changes on future periods of contract performance is recognized as if the revised estimate had been the original estimate.

Goodwill_and_Other_Purchased_I1

Goodwill and Other Purchased Intangible Assets Goodwill (Policies)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets, Goodwill, Policy	'
	HII performs impairment tests for goodwill as of November 30 of each year and between annual impairment tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the Company's reporting units below their carrying value.

Business_Arrangements_Equity_M

Business Arrangements Equity Method Investments (Policies)	9 Months Ended
	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Equity Method Investments, Policy	'
	HII periodically enters into business arrangements with non-affiliated entities. These arrangements generally consist of business ventures designed to deliver collective capabilities that would not have been available to the venture's participants individually, and provide a single point of contact during contract performance to the entity's principal customer. In some arrangements, each equity participant receives a subcontract from the business venture for a pre-determined scope of work. In other cases, the arrangements rely primarily on the assignment of key personnel to the venture from each equity participant rather than subcontracts for a specific work scope. Based on the terms of these arrangements and the relevant GAAP related to consolidation accounting for such entities, the Company does not consolidate the financial position, results of operations or cash flows of these entities into its unaudited condensed consolidated financial statements, but accounts for them under the equity method. To the extent HII acts as a subcontractor in these arrangements, HII's subcontract activities are recorded in the same manner as sales to non-affiliated entities.

Avondale_Tables

Avondale (Tables)	9 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]	'
Liability for restructuring and shutdown related costs	'
	The table below summarizes the changes in the Company's liability for restructuring and shutdown related costs associated with winding down the Avondale facility. As of September 30, 2013 and 2012, these costs were comprised primarily of employee severance and retention payments as well as incentive bonuses. These amounts were capitalized in inventoried costs, and will be recognized as expenses in cost of product sales beginning in 2014.
	($ in millions)
	Balance as of December 31, 2011	$	50
	Payments	(29		)
	Adjustments	9
	Balance as of September 30, 2012	$	30
	Balance as of December 31, 2012	$	24
	Payments	(14		)
	Adjustments	8
	Balance as of September 30, 2013	$	18

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Calculation of Basic and Diluted Earnings Per Share	'
	The calculation of basic and diluted earnings per common share was as follows:
		Three Months Ended				Nine Months Ended
		30-Sep				30-Sep
	(in millions, except per share amounts)	2013		2012		2013		2012
	Net earnings (loss)	$	69	$	13	$	170	$	96
	Weighted-average common shares outstanding	49.9		49.6		49.9		49.3
	Net effect of dilutive stock options	0.3		0.2		0.3		0.2
	Net effect of dilutive restricted stock rights	0.3		0.2		0.3		0.2
	Net effect of dilutive restricted performance stock rights	0.1		0.3		—		0.2
	Dilutive weighted-average common shares outstanding	50.6		50.3		50.5		49.9
	Earnings (loss) per share - basic	$	1.38	$	0.26	$	3.41	$	1.95
	Earnings (loss) per share - diluted	$	1.36	$	0.26	$	3.37	$	1.92

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment Results	'
	The following table presents segment results for the three and nine months ended September 30, 2013 and 2012:
		Three Months Ended						Nine Months Ended
		30-Sep						30-Sep
	($ in millions)	2013			2012			2013			2012
	Sales and Service Revenues
	Ingalls	$	639		$	670		$	1,942		$	2,118
	Newport News	1,018			944			2,999			2,818
	Intersegment eliminations	(20		)	(18		)	(59		)	(51		)
	Total sales and service revenues	$	1,637		$	1,596		$	4,882		$	4,885
	Operating Income (Loss)
	Ingalls	$	49		$	1		$	110		$	59
	Newport News	93			88			288			258
	Total segment operating income (loss)	142			89			398			317
	Non-segment factors affecting operating income (loss)
	FAS/CAS Adjustment	(13		)	(19		)	(54		)	(55		)
	Deferred state income taxes	(2		)	(4		)	(6		)	(10		)
	Total operating income (loss)	$	127		$	66		$	338		$	252
	FAS/CAS Adjustment - The FAS/CAS Adjustment reflects the difference between expenses for pension and other postretirement benefits determined in accordance with GAAP and the expenses for these items included in segment operating income in accordance with U.S. Cost Accounting Standards ("CAS").

Inventoried_Costs_Net_Tables

Inventoried Costs, Net (Tables)	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Inventoried costs, net	'
	Inventoried costs were composed of the following:
	($ in millions)	September 30			December 31
		2013			2012
	Production costs of contracts in process	$	246		$	198
	General and administrative expenses	2			3
		248			201
	Progress payments received	(1		)	(1		)
		247			200
	Raw material inventory	93			88
	Total inventoried costs, net	$	340		$	288

Goodwill_and_Other_Purchased_I2

Goodwill and Other Purchased Intangible Assets Goodwill (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Purchased Intangible Assets	'
	The following table summarizes the Company's aggregate purchased intangible assets, all of which are program related intangible assets.
	($ in millions)	September 30			December 31
		2013			2012
	Gross carrying amount	$	939		$	939
	Accumulated amortization	(407		)	(391		)
	Net carrying amount	$	532		$	548

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Net Deferred Tax Assets	'
	Net deferred tax assets as presented in the unaudited condensed consolidated statements of financial position were as follows:
	($ in millions)	September 30		December 31
		2013		2012
	Net current deferred tax assets	$	218	$	213
	Net non-current deferred tax assets	248		329
	Total net deferred tax assets	$	466	$	542

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt	'
	Long-term debt consisted of the following:
	($ in millions)	September 30		December 31
		2013		2012
	Term loan due March 30, 2016	$	503	$	525
	Senior notes due March 15, 2018, 6.875%	600		600
	Senior notes due March 15, 2021, 7.125%	600		600
	Mississippi economic development revenue bonds due May 1, 2024, 7.81%	84		84
	Gulf opportunity zone industrial development revenue bonds due December 1, 2028, 4.55%	21		21
	Total long-term debt	1,808		1,830
	Less current portion	65		51
	Long-term debt, net of current portion	$	1,743	$	1,779

Business_Arrangements_Equity_M1

Business Arrangements Equity Method Investments (Tables)	9 Months Ended
	Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Results of Operations	'
	The following table presents summarized financial information for the Company's equity method investments:
	Results of Operations
		Three Months Ended				Nine Months Ended
		30-Sep				30-Sep
	($ in millions)	2013		2012		2013		2012
	Sales and services revenues	$	292	$	359	$	796	$	1,024
	Operating income	27		20		39		37
	Net earnings	27		20		39		37

Recovered_Sheet1

Employee Pension and Other Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Schedule of Net Benefit Costs	'
	The cost of the Company's defined benefit plans and other postretirement plans for the three and nine months ended September 30, 2013 and 2012, was as follows:
		Three Months Ended												Nine Months Ended
		30-Sep												30-Sep
		Pension Benefits						Other Benefits						Pension Benefits						Other Benefits
	($ in millions)	2013			2012			2013			2012			2013			2012			2013			2012
	Components of Net Periodic Benefit Cost
	Service cost	$	37		$	33		$	5		$	4		$	110		$	99		$	16		$	12
	Interest cost	54			53			8			9			161			159			26			27
	Expected return on plan assets	(72		)	(67		)	—			—			(216		)	(200		)	—			—
	Amortization of prior service cost (credit)	4			3			(7		)	(2		)	13			9			(14		)	(7		)
	Amortization of net actuarial loss (gain)	29			19			4			3			88			58			12			8
	Net periodic benefit cost	$	52		$	41		$	10		$	14		$	156		$	125		$	40		$	40
Schedule of Defined Benefit Plans Disclosures, Cash Contributions	'
	The Company's cash contributions for the nine months ended September 30, 2013 and 2012, were as follows:
		Nine Months Ended
		30-Sep
	($ in millions)	2013			2012
	Pension plans
	Qualified minimum	$	—		$	143
	Discretionary
	Qualified	301			87
	Non-qualified	3			3
	Other benefit plans	26			25
	Total contributions	$	330		$	258
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	($ in millions)	Benefit Plans			Other			Total
	Balance as of June 30, 2013	$	(1,097	)	$	1		$	(1,096	)
	Other comprehensive income before reclassifications	—			1			1
	Amounts reclassified from accumulated other comprehensive income (loss)
	Amortization of prior service credit (cost)	(2		)	—			(2		)
	Amortization of actuarial gain (loss)	19			—			19
	Net current period other comprehensive income (loss)	17			1			18
	Balance as of September 30, 2013	$	(1,080	)	$	2		$	(1,078	)
	($ in millions)	Benefit Plans			Other			Total
	Balance as of December 31, 2012	$	(1,226	)	$	—		$	(1,226	)
	Other comprehensive income before reclassifications	87			2			89
	Amounts reclassified from accumulated other comprehensive income (loss)
	Amortization of prior service credit (cost)	(1		)	—			(1		)
	Amortization of actuarial gain (loss)	60			—			60
	Net current period other comprehensive income (loss)	146			2			148
	Balance as of September 30, 2013	$	(1,080	)	$	2		$	(1,078	)

Stock_Compensation_Plans_Table

Stock Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Status of Stock Option Awards	'
	The following table summarizes the status of the Company's stock option awards as of September 30, 2013:
		Shares Under	Weighted-		Weighted- Average	Aggregate
		Option	Average		Remaining	Intrinsic
		(in thousands)	Exercise Price		Contractual Term	Value
					(in years)	($ in millions)
	Outstanding and exercisable at September 30, 2013	849	$	36.27	2.3	$	28
Schedule of Status of Stock Awards	'
	The following table summarizes the status of the Company's outstanding stock awards as of September 30, 2013:
		Stock Awards	Weighted-Average		Weighted-Average Remaining Contractual Term
		(in thousands)	Grant Date Fair		(in years)
			Value
	Total stock awards	2,133	$	41.33	1.1

Subsidiary_Guarantors_Tables

Subsidiary Guarantors (Tables)	9 Months Ended
	Sep. 30, 2013
Subsidiary Guarantors [Abstract]	'
Schedule of Condensed Consolidating Statements of Operations and Comprehensive Income	'
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
		Three Months Ended September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	1,394		$	—	$	—		$	1,394
	Service revenues	—			243			6		(6		)	243
	Total sales and service revenues	—			1,637			6		(6		)	1,637
	Cost of sales and service revenues
	Cost of product sales	—			1,123			—		—			1,123
	Cost of service revenues	—			210			6		(6		)	210
	Income (loss) from operating investments, net	—			9			—		—			9
	General and administrative expenses	—			186			—		—			186
	Operating income (loss)	—			127			—		—			127
	Interest expense	(26		)	(2		)	—		—			(28		)
	Equity in earnings (loss) of subsidiaries	87			—			—		(87		)	—
	Earnings (loss) before income taxes	61			125			—		(87		)	99
	Federal income taxes	(8		)	38			—		—			30
	Net earnings (loss)	$	69		$	87		$	—	$	(87	)	$	69
	Other comprehensive income (loss), net of tax	18			18			—		(18		)	18
	Comprehensive income (loss)	$	87		$	105		$	—	$	(105	)	$	87
		Three Months Ended September 30, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	1,367		$	—	$	—		$	1,367
	Service revenues	—			229			6		(6		)	229
	Total sales and service revenues	—			1,596			6		(6		)	1,596
	Cost of sales and service revenues
	Cost of product sales	—			1,187			—		—			1,187
	Cost of service revenues	—			186			6		(6		)	186
	Income (loss) from operating investments, net	—			7			—		—			7
	General and administrative expenses	—			164			—		—			164
	Operating income (loss)	—			66			—		—			66
	Interest expense	(28		)	(1		)	—		—			(29		)
	Equity in earnings (loss) of subsidiaries	31			—			—		(31		)	—
	Earnings (loss) before income taxes	3			65			—		(31		)	37
	Federal income taxes	(10		)	34			—		—			24
	Net earnings (loss)	$	13		$	31		$	—	$	(31	)	$	13
	Other comprehensive income (loss), net of tax	17			17			—		(17		)	17
	Comprehensive income (loss)	$	30		$	48		$	—	$	(48	)	$	30
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
		Nine Months Ended September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	4,138		$	—	$	—		$	4,138
	Service revenues	—			744			17		(17		)	744
	Total sales and service revenues	—			4,882			17		(17		)	4,882
	Cost of sales and service revenues
	Cost of product sales	—			3,366			—		—			3,366
	Cost of service revenues	—			650			17		(17		)	650
	Income (loss) from operating investments, net	—			13			—		—			13
	General and administrative expenses	—			541			—		—			541
	Operating income (loss)	—			338			—		—			338
	Interest expense	(81		)	(6		)	—		—			(87		)
	Equity in earnings (loss) of subsidiaries	225			—			—		(225		)	—
	Earnings (loss) before income taxes	144			332			—		(225		)	251
	Federal income taxes	(26		)	107			—		—			81
	Net earnings (loss)	$	170		$	225		$	—	$	(225	)	$	170
	Other comprehensive income (loss), net of tax	148			148			—		(148		)	148
	Comprehensive income (loss)	$	318		$	373		$	—	$	(373	)	$	318
		Nine Months Ended September 30, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Sales and service revenues
	Product sales	$	—		$	4,224		$	—	$	—		$	4,224
Service revenues	—			661			13		(13		)	661
Total sales and service revenues	—			4,885			13		(13		)	4,885
Cost of sales and service revenues
Cost of product sales	—			3,578			—		—			3,578
Cost of service revenues	—			562			13		(13		)	562
Income (loss) from operating investments, net	—			13			—		—			13
General and administrative expenses	—			506			—		—			506
Operating income (loss)	—			252			—		—			252
Interest expense	(83		)	(5		)	—		—			(88		)
Equity in earnings (loss) of subsidiaries	149			—			—		(149		)	—
Earnings (loss) before income taxes	66			247			—		(149		)	164
Federal income taxes	(30		)	98			—		—			68
Net earnings (loss)	$	96		$	149		$	—	$	(149	)	$	96
Other comprehensive income (loss), net of tax	45			45			—		(45		)	45
Comprehensive income (loss)	$	141		$	194		$	—	$	(194	)	$	141
Schedule of Condensed Consolidating Statement of Financial Position	'
	CONDENSED CONSOLIDATING STATEMENTS OF FINANCIAL POSITION
		September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Assets
	Current Assets
	Cash and cash equivalents	$	894		$	—		$	1	$	—		$	895
	Accounts receivable, net	—			1,055			—		—			1,055
	Inventoried costs, net	—			340			—		—			340
	Deferred income taxes	—			218			—		—			218
	Prepaid expenses and other current assets	—			24			11		(12		)	23
	Total current assets	894			1,637			12		(12		)	2,531
	Property, plant, and equipment, net	—			1,964			—		—			1,964
	Goodwill	—			881			—		—			881
	Other purchased intangibles, net	—			532			—		—			532
	Miscellaneous other assets	33			338			—		—			371
	Investment in subsidiaries	2,618			—			—		(2,618		)	—
	Intercompany receivables	—			899			—		(899		)	—
	Total assets	$	3,545		$	6,251		$	12	$	(3,529	)	$	6,279
	Liabilities and Stockholders' Equity
	Current Liabilities
	Trade accounts payable	$	—		$	287		$	—	$	—		$	287
	Accrued employees’ compensation	—			205			—		—			205
	Current portion of long-term debt	65			—			—		—			65
	Current portion of postretirement plan liabilities	—			148			—		—			148
	Current portion of workers’ compensation liabilities	—			225			—		—			225
	Advance payments and billings in excess of revenues	—			139			—		—			139
	Other current liabilities	8			325			12		(12		)	333
	Total current liabilities	73			1,329			12		(12		)	1,402
	Long-term debt	1,638			105			—		—			1,743
	Pension plan liabilities	—			1,082			—		—			1,082
	Other postretirement plan liabilities	—			656			—		—			656
	Workers’ compensation liabilities	—			409			—		—			409
	Other long-term liabilities	—			52			—		—			52
	Intercompany liabilities	899			—			—		(899		)	—
	Total liabilities	2,610			3,633			12		(911		)	5,344
	Stockholders’ equity	935			2,618			—		(2,618		)	935
	Total liabilities and stockholders’ equity	$	3,545		$	6,251		$	12	$	(3,529	)	$	6,279
	CONDENSED CONSOLIDATING STATEMENTS OF FINANCIAL POSITION
		December 31, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Assets
	Current Assets
	Cash and cash equivalents	$	1,056		$	—		$	1	$	—		$	1,057
	Accounts receivable, net	—			905			—		—			905
	Inventoried costs, net	—			288			—		—			288
	Deferred income taxes	—			213			—		—			213
	Prepaid expenses and other current assets	—			22			4		(5		)	21
	Total current assets	1,056			1,428			5		(5		)	2,484
	Property, plant, and equipment, net	—			2,034			—		—			2,034
	Goodwill	—			881			—		—			881
	Other purchased intangibles, net	—			548			—		—			548
	Miscellaneous other assets	39			406			—		—			445
	Investment in subsidiaries	2,282			—			—		(2,282		)	—
	Intercompany receivables	—			960			—		(960		)	—
	Total assets	$	3,377		$	6,257		$	5	$	(3,247	)	$	6,392
	Liabilities and Stockholders' Equity
	Current Liabilities
	Trade accounts payable	$	—		$	377		$	—	$	—		$	377
	Accrued employees’ compensation	—			235			—		—			235
	Current portion of long-term debt	51			—			—		—			51
	Current portion of postretirement plan liabilities	—			166			—		—			166
	Current portion of workers’ compensation liabilities	—			216			—		—			216
	Advance payments and billings in excess of revenues	—			134			—		—			134
Other current liabilities	25			180			5		(5		)	205
Total current liabilities	76			1,308			5		(5		)	1,384
Long-term debt	1,674			105			—		—			1,779
Pension plan liabilities	—			1,301			—		—			1,301
Other postretirement plan liabilities	—			799			—		—			799
Workers’ compensation liabilities	—			403			—		—			403
Other long-term liabilities	—			59			—		—			59
Intercompany liabilities	960			—			—		(960		)	—
Total liabilities	2,710			3,975			5		(965		)	5,725
Stockholders’ equity	667			2,282			—		(2,282		)	667
Total liabilities and stockholders’ equity	$	3,377		$	6,257		$	5	$	(3,247	)	$	6,392
Schedule of Condensed Consolidating Statements of Cash Flows	'
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
		Nine Months Ended September 30, 2013
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Net cash provided by (used in) operating activities	$	(73	)	$	17		$	—	$	—		$	(56	)
	Investing Activities
	Additions to property, plant, and equipment	—			(85		)	—		—			(85		)
	Proceeds from insurance settlement	—			58			—		—			58
	Net cash provided by (used in) investing activities	—			(27		)	—		—			(27		)
	Financing Activities
	Repayment of long-term debt	(22		)	—			—		—			(22		)
	Dividends paid	(15		)	—			—		—			(15		)
	Repurchases of common stock	(53		)	—			—		—			(53		)
	Proceeds from stock option exercises	6			—			—		—			6
	Excess tax benefit related to stock-based compensation	—			5			—		—			5
	Cash sweep/funding by parent	(5		)	5			—		—			—
	Net cash provided by (used in) financing activities	(89		)	10			—		—			(79		)
	Change in cash and cash equivalents	(162		)	—			—		—			(162		)
	Cash and cash equivalents, beginning of period	1,056			—			1		—			1,057
	Cash and cash equivalents, end of period	$	894		$	—		$	1	$	—		$	895
		Nine Months Ended September 30, 2012
	($ in millions)	Huntington Ingalls Industries, Inc.			Subsidiary Guarantors			Non-Guarantor Subsidiaries		Eliminations			Consolidated
	Net cash provided by (used in) operating activities	$	(76	)	$	34		$	1	$	—		$	(41	)
	Investing Activities
	Additions to property, plant, and equipment	—			(92		)	—		—			(92		)
	Net cash provided by (used in) investing activities	—			(92		)	—		—			(92		)
	Financing Activities
	Repayment of long-term debt	(22		)	—			—		—			(22		)
	Proceeds from stock option exercises	6			—			—		—			6
	Cash sweep/funding by parent	(58		)	58			—		—			—
	Net cash provided by (used in) financing activities	(74		)	58			—		—			(16		)
	Change in cash and cash equivalents	(150		)	—			1		—			(149		)
	Cash and cash equivalents, beginning of period	915			—			—		—			915
	Cash and cash equivalents, end of period	$	765		$	—		$	1	$	—		$	766

Description_of_Business_Detail

Description of Business (Details) (USD $)	0 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Mar. 30, 2011	Sep. 30, 2013	Mar. 30, 2011	Mar. 30, 2011	Mar. 30, 2011	Sep. 30, 2012	Sep. 30, 2012
		segments	HII Credit Facility	Senior Notes	Term Loan	Post-Spin-Off	Post-Spin-Off
			Revolver		HII Credit Facility	Northrop Grumman	Northrop Grumman
						Transition Services Agreement	Transition Services Agreement
						Former Parent	Former Parent
Debt Instrument	'	'	'	'	'	'	'
Number of Operating Segments	'	2	'	'	'	'	'
Costs incurred under the Transition Services Agreement	'	'	'	'	'	$3	$19
Contribution to Northrop Grumman	1,429	'	'	'	'	'	'
Debt instrument, face amount	'	'	'	1,200	575	'	'
Credit facility revolver	'	'	$650	'	'	'	'

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	0 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Oct. 30, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Change in Accounting Estimate	'	'	'	'	'	'	'	'
Dividends declared per share	'	$0.10	$0.10	$0.10	'	$0.30	'	'
Dividends declared	'	'	'	'	'	$15	'	'
Amount previously authorized for stock repurchase program	'	'	'	'	'	'	'	150
Amount authorized for stock repurchase program	300	'	'	'	'	'	'	'
Stock repurchase program, period in force	'	'	'	'	'	'	'	'3 years
Repurchased shares of treasury stock	'	'	'	'	'	919,866	'	'
Treasury stock activity	'	'	'	'	'	56	'	'
Contracts Accounted for under Percentage of Completion	'	'	'	'	'	'	'	'
Change in Accounting Estimate	'	'	'	'	'	'	'	'
Increase (decrease) in operating income due to net cumulative catch-up adjustments	'	$2	'	'	($9)	$67	$39	'
Increase (decrease) in diluted earnings per share due to net cumulative catch-up adjustments	'	$0.02	'	'	($0.12)	$0.86	$0.50	'

Avondale_Details

Avondale (Details) (Avondale Wind Down, USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Total	'	'
Restructuring Cost and Reserve	'	'
Estimated total costs	$256	'
Estimated total costs, initial estimate	310	'
Amount in question by DCAA	25	'
Amount in question by DCAA, percent of total submitted	8.00%	'
Estimated total costs, revised submission	271	'
Compensation	'	'
Restructuring Reserve [Roll Forward]	'	'
Beginning balance	24	50
Payments	-14	-29
Adjustments	8	9
Ending balance	$18	$30

Gulfport_Details

Gulfport (Details) (Facility closing, Gulfport, USD $)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Facility closing | Gulfport	'	'
Restructuring Cost and Reserve	'	'
Estimated total costs	'	$57
Expected accelerated depreciation cost	'	52
Expected personnel cost	'	2
Other expected restructuring cost	'	3
Expected payments for restructuring	'	4
Restructuring charges	13	13
Effect of restructuring charges on operating results	($17)	($17)

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Basic and Diluted [Abstract]	'	'	'	'
Net earnings (loss)	$69	$13	$170	$96
Weighted-average common shares outstanding (in shares)	49.9	49.6	49.9	49.3
Dilutive weighted-average common shares outstanding (in shares)	50.6	50.3	50.5	49.9
Earnings (loss) per share - basic (in dolalrs per shaer)	$1.38	$0.26	$3.41	$1.95
Earnings (loss) per share - diluted (in dollars per share)	$1.36	$0.26	$3.37	$1.92
Stock Options	'	'	'	'
Earnings Per Share, Basic and Diluted [Abstract]	'	'	'	'
Net effect of dilutive (in shares)	0.3	0.2	0.3	0.2
Restricted stock rights	'	'	'	'
Earnings Per Share, Basic and Diluted [Abstract]	'	'	'	'
Net effect of dilutive (in shares)	0.3	0.2	0.3	0.2
Restricted performance stock rights	'	'	'	'
Earnings Per Share, Basic and Diluted [Abstract]	'	'	'	'
Net effect of dilutive (in shares)	0.1	0.3	'	0.2

Earnings_Per_Share_Narrative_D

Earnings Per Share - Narrative (Details)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Options	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share	'	'	'	'
Antidilutive securities excluded from computation of earnings per share, amount	0.7	1	0.7	1
Restricted stock rights	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share	'	'	'	'
Antidilutive securities excluded from computation of earnings per share, amount	0.3	0.4	0.3	0.4
Restricted performance stock rights	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share	'	'	'	'
Antidilutive securities excluded from computation of earnings per share, amount	1.3	1.2	1.4	1.2

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	segments
Segment Reporting Information	'	'	'	'
Number of reportable segments	2	'	'	'
Sales and Service Revenues	'	'	'	'
Sales and service revenue	$1,637	$1,596	$4,882	$4,885
Operating Income (Loss)	'	'	'	'
Operating income (loss)	127	66	338	252
Operating Segments	'	'	'	'
Operating Income (Loss)	'	'	'	'
Operating income (loss)	142	89	398	317
Ingalls	'	'	'	'
Sales and Service Revenues	'	'	'	'
Sales and service revenue	639	670	1,942	2,118
Operating Income (Loss)	'	'	'	'
Operating income (loss)	49	1	110	59
Newport News	'	'	'	'
Sales and Service Revenues	'	'	'	'
Sales and service revenue	1,018	944	2,999	2,818
Operating Income (Loss)	'	'	'	'
Operating income (loss)	93	88	288	258
Intersegment Elimination	'	'	'	'
Sales and Service Revenues	'	'	'	'
Sales and service revenue	-20	-18	-59	-51
Non-segment factors affecting operating income (loss)	'	'	'	'
Non-segment factors affecting operating income (loss)	'	'	'	'
FAS/CAS Adjustment	-13	-19	-54	-55
Deferred state income taxes	($2)	($4)	($6)	($10)

Inventoried_Costs_Net_Details

Inventoried Costs, Net (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Production costs of contracts in process	$246	$198
General and administrative expenses	2	3
Inventoried costs	248	201
Progress payments received	-1	-1
Inventoried costs, net of progress payments	247	200
Raw material inventory	93	88
Total inventoried costs, net	$340	$288

Goodwill_Details

Goodwill (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Goodwill	'	'
Accumulated goodwill impairment losses	$2,755	$2,755
Ingalls	'	'
Goodwill	'	'
Accumulated goodwill impairment losses	1,568	1,568
Newport News	'	'
Goodwill	'	'
Accumulated goodwill impairment losses	$1,187	$1,187

Purchased_Intangible_Assets_De

Purchased Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross carrying amount	$939	'	$939	'	$939
Accumulated amortization	-407	'	-407	'	-391
Net carrying amount	532	'	532	'	548
Aggregate weighted-average amortization period	'	'	'40 years	'	'
Amortization of purchased intangibles	5	5	16	15	'
Expected amortization for purchased intangible assets:	'	'	'	'	'
Expected amortization, 2013	20	'	20	'	'
Expected amortization, 2014	20	'	20	'	'
Expected amortization, 2015	20	'	20	'	'
Expected amortization, 2016	20	'	20	'	'
Expected amortization, 2017	$20	'	$20	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Effective income tax rate	30.30%	64.90%	32.30%	41.50%	'
Net deferred tax assets presented:	'	'	'	'	'
Net current deferred tax assets	$218	'	$218	'	$213
Net non-current deferred tax assets	248	'	248	'	329
Total net deferred tax assets	466	'	466	'	542
Post-Spin-Off | Northrop Grumman | Former Parent | Tax Matters Agreement	'	'	'	'	'
Non-cash tax adjustments under the Tax Matters Agreement	'	8	'	8	'

Debt_Details

Debt (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Debt Instrument	'	'
Total long-term debt	$1,808	$1,830
Less current portion	65	51
Long-term debt, net of current portion	1,743	1,779
Term Loan | Term Loan Due March 30, 2016	'	'
Debt Instrument	'	'
Total long-term debt	503	525
Senior Notes | Senior Notes Due March 15, 2018, 6.875 Percent	'	'
Debt Instrument	'	'
Total long-term debt	600	600
Stated percentage	6.88%	6.88%
Senior Notes | Senior Notes Due March 15, 2021, 7.125 Percent	'	'
Debt Instrument	'	'
Total long-term debt	600	600
Stated percentage	7.13%	7.13%
Bonds | Mississippi Economic Development Revenue Bonds Due May 1, 2014, 7.81 Percent	'	'
Debt Instrument	'	'
Total long-term debt	84	84
Stated percentage	7.81%	7.81%
Bonds | Gulf Opportunity Zone Industrial Development Revenue Bonds Due December 1, 2028, 4.55 Percent	'	'
Debt Instrument	'	'
Total long-term debt	$21	$21
Stated percentage	4.55%	4.55%

Debt_Narrative_Details

Debt - Narrative (Details) (USD $)	0 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Mar. 30, 2011	Sep. 30, 2013	Dec. 31, 2012
Credit Facility	'	'	'
Long-term debt	'	$1,808	$1,830
Estimated fair value of long-term debt	'	1,943	1,974
Senior Notes	'	'	'
Credit Facility	'	'	'
Debt instrument, face amount	1,200	'	'
Term Loan Due March 30, 2016 | Term Loan	'	'	'
Credit Facility	'	'	'
Debt instrument, face amount	575	'	'
Spread on variable rate	'	2.50%	'
Long-term debt	'	503	525
Term of debt instrument	'5 years	'	'
Debt instrument, description of variable rate basis	'	'LIBOR	'
Amortization expense as a percentage of balance	'	'	'
Amortization of term loan, year one	'	5.00%	'
Debt Instrument, Amortization as a Percentage of Initial Balance, Amortization in Year Two	'	5.00%	'
Debt Instrument, Amortization as a Percentage of Initial Balance, Amortization in Year Three	'	10.00%	'
Debt Instrument, Amortization as a Percentage of Initial Balance, Amortization in Year Four	'	15.00%	'
Debt Instrument, Amortization as a Percentage of Initial Balance, Amortization in Year Five	'	65.00%	'
Debt Instrument, Periodic Payment as a Percentage of Initial Balance, Quarterly Payment in Year 5	'	5.00%	'
Term Loan Due March 30, 2016 | Term Loan | Minimum	'	'	'
Credit Facility	'	'	'
Spread on variable rate	'	2.00%	'
Term Loan Due March 30, 2016 | Term Loan | Maximum	'	'	'
Credit Facility	'	'	'
Spread on variable rate	'	3.00%	'
HII Credit Facility | Revolving Credit Facility	'	'	'
Credit Facility	'	'	'
Credit facility revolver	650	'	'
Spread on variable rate	'	2.50%	'
Commitment fee, based on unused capacity	'	0.50%	'
Remaining unutilized amount	'	618	'
Term of debt instrument	'5 years	'	'
Debt instrument, description of variable rate basis	'	'LIBOR	'
HII Credit Facility | Revolving Credit Facility | Minimum	'	'	'
Credit Facility	'	'	'
Spread on variable rate	'	2.00%	'
Commitment fee, based on unused capacity	'	0.35%	'
HII Credit Facility | Revolving Credit Facility | Maximum	'	'	'
Credit Facility	'	'	'
Spread on variable rate	'	3.00%	'
Commitment fee, based on unused capacity	'	0.50%	'
HII Credit Facility | Letter of Credit	'	'	'
Credit Facility	'	'	'
Credit facility revolver	350	'	'
HII Credit Facility | Swingline Loan Subfacility	'	'	'
Credit Facility	'	'	'
Credit facility revolver	100	'	'
HII Credit Facility | Letters of Credit	'	'	'
Credit Facility	'	'	'
Letters of credit issued but undrawn	'	32	'
HII Credit Facility | Term Loan	'	'	'
Credit Facility	'	'	'
Debt instrument, face amount	575	'	'
Senior Notes Due March 15, 2018, 6.875 Percent | Senior Notes	'	'	'
Credit Facility	'	'	'
Debt instrument, face amount	'	600	'
Stated percentage	'	6.88%	6.88%
Long-term debt	'	600	600
Senior Notes Due March 15, 2021, 7.125 Percent | Senior Notes	'	'	'
Credit Facility	'	'	'
Debt instrument, face amount	'	600	'
Stated percentage	'	7.13%	7.13%
Long-term debt	'	600	600
Mississippi Economic Development Revenue Bonds Due May 1, 2014, 7.81 Percent | Bonds	'	'	'
Credit Facility	'	'	'
Stated percentage	'	7.81%	7.81%
Long-term debt	'	84	84
Gulf Opportunity Zone Industrial Development Revenue Bonds Due December 1, 2028, 4.55 Percent | Bonds	'	'	'
Credit Facility	'	'	'
Stated percentage	'	4.55%	4.55%
Long-term debt	'	$21	$21

Business_Arrangements_Equity_M2

Business Arrangements Equity Method Investment (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
					Savannah River Nuclear Solutions, LLC	Savannah River Nuclear Solutions, LLC	Savannah River Nuclear Solutions, LLC
Schedule of Equity Method Investments	'	'	'	'	'	'	'
Equity method investments, ownership percentage	'	'	'	'	34.00%	'	34.00%
Carrying amount of SRNS	'	'	'	'	$12	'	$4
Cash dividends from SRNS	'	'	'	'	6	9	'
Summarized financial information of equity method investments	'	'	'	'	'	'	'
Sales and services revenues	292	359	796	1,024	'	'	'
Operating income	27	20	39	37	'	'	'
Net earnings	$27	$20	$39	$37	'	'	'

Investigations_Claims_and_Liti1

Investigations, Claims, and Litigation (Details) (USD $)	20 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2013
	False Claims Act [Member]	Ingalls Timecharging Investigation [Member]
	Minimum
Loss Contingencies	'	'
Monetary damages	$835	'
Contract receivable retainage initially withheld	'	24
Contract receivable retainage previously withheld	'	18.2
Contract receivable retainage	'	13.1
Customer estimate of misallocated costs and overstated progress	'	5.3
Estimate of misallocated costs and overstated progress	'	$4

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Commitments and Contingencies	'
Probable future cost for envionmental remediation	$2
Surety Bonds Outstanding	'
Commitments and Contingencies	'
Surety bonds outstanding	352
HII Credit Facility | Letters of Credit	'
Commitments and Contingencies	'
Letters of credit issued but undrawn	$32

Impacts_from_Hurricanes_Detail

Impacts from Hurricanes (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Business Interruption Loss	'
Insurance recoveries	$677.50
Factory Mutual Insurance Company	'
Business Interruption Loss	'
Insurance recoveries	180
Recovery of Lost Profits | Factory Mutual Insurance Company	'
Business Interruption Loss	'
Impact to operating income from insurance recoveries	46
Minimum | Aon Risk Insurance Services West, Inc.	'
Business Interruption Loss	'
Monetary damages sought	$200

Employee_Pension_and_Other_Pos1

Employee Pension and Other Postretirement Benefits Net Benefit Costs (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Benefits	'	'	'	'
Defined Benefit Plan Disclosure	'	'	'	'
Service cost	$37	$33	$110	$99
Interest cost	54	53	161	159
Expected return on plan assets	-72	-67	-216	-200
Amortization of prior service cost (credit)	4	3	13	9
Amortization of net actuarial loss (gain)	29	19	88	58
Net periodic benefit cost	52	41	156	125
Other Benefits	'	'	'	'
Defined Benefit Plan Disclosure	'	'	'	'
Service cost	5	4	16	12
Interest cost	8	9	26	27
Amortization of prior service cost (credit)	-7	-2	-14	-7
Amortization of net actuarial loss (gain)	4	3	12	8
Net periodic benefit cost	$10	$14	$40	$40

Employee_Pension_and_Other_Pos2

Employee Pension and Other Postretirement Benefits Cash Contributions (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure	'	'
Other benefit plans	$26	$25
Total contributions	330	258
Full year 2013 cash contributions to qualified defined benefit pension plans	301	'
Minimum Contribution | Qualified	'	'
Defined Benefit Plan Disclosure	'	'
Pension contributions	'	143
Discretionary Contribution | Qualified	'	'
Defined Benefit Plan Disclosure	'	'
Pension contributions	301	87
Discretionary Contribution | Non-qualified	'	'
Defined Benefit Plan Disclosure	'	'
Pension contributions	$3	$3

Employee_Pension_and_Other_Pos3

Employee Pension and Other Postretirement Benefits Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Defined Benefit Plan Disclosure	'	'	'	'	'	'	'
Defined benefit plan, plan amendment	'	($177)	$30	'	'	'	'
Unamortized benefit plan costs	1,080	1,097	'	'	1,080	'	1,226
Other	2	1	'	'	2	'	'
Accumulated other comprehensive income (loss)	-1,078	-1,096	'	'	-1,078	'	-1,226
AOCI, tax benefit	701	'	'	'	701	'	802
Other comprehensive income before reclassifications	1	'	'	'	89	'	'
Net current period other comprehensive income (loss)	18	'	'	17	148	45	'
Other	'	'	'	'	'	'	'
Defined Benefit Plan Disclosure	'	'	'	'	'	'	'
Other comprehensive income before reclassifications	1	'	'	'	2	'	'
Net current period other comprehensive income (loss)	1	'	'	'	2	'	'
Benefit Plans	'	'	'	'	'	'	'
Defined Benefit Plan Disclosure	'	'	'	'	'	'	'
Other comprehensive income before reclassifications	'	'	'	'	87	'	'
Net current period other comprehensive income (loss)	17	'	'	'	146	'	'
Reclassification out of AOCI | Benefit Plans	'	'	'	'	'	'	'
Defined Benefit Plan Disclosure	'	'	'	'	'	'	'
Amortization of prior service credit (cost)	-2	'	'	'	-1	'	'
Amortization of actuarial gain (loss)	$19	'	'	'	$60	'	'

Stock_Compensation_Plans_Detai

Stock Compensation Plans (Details) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Feb. 19, 2013	Feb. 19, 2013	Feb. 19, 2013	Sep. 30, 2013
					Restricted performance stock rights	Restricted performance stock rights	Restricted performance stock rights	Restricted performance stock rights	Restricted stock rights
							Minimum	Maximum
Options outstanding	'	'	'	'	'	'	'	'	'
Shares under option	849,000	'	849,000	'	'	'	'	'	'
Weighted-average exercise price	$36.27	'	$36.27	'	'	'	'	'	'
Weighted-average remaining contractual term	'2 years 4 months	'	'	'	'	'	'	'	'
Aggregate intrinsic value	$28	'	$28	'	'	'	'	'	'
Stock awards	'	'	'	'	'	'	'	'	'
Stock rights granted	'	'	'	'	400,000	'	'	'	'
Total stock awards, weighted-average grant date fair value	$41.33	'	$41.33	'	'	$45.54	'	'	'
Stock awards, vesting period	'	'	'	'	'2 years 10 months	'	'	'	'
Restricted performance stock rights ultimate vesting percentage	'	'	'	'	'	'	0.00%	200.00%	'
Total stock awards, outstanding	2,133,000	'	2,133,000	'	'	'	'	'	'
Total stock awards, weighted-average remaining contractual term	'1 year 1 month	'	'	'	'	'	'	'	'
Compensation expense	'	'	'	'	'	'	'	'	'
Total stock-based compensation expense	9	9	28	25	'	'	'	'	'
Tax benefits recognized for stock-based compensation	4	3	11	10	'	'	'	'	'
Unrecognized compensation expense	'	'	'	'	'	'	'	'	'
Unrecognized compensation expense, stock awards	'	'	'	'	$35	'	'	'	$4
Unrecognized compensation expense, weighted average period of recognition	'	'	'	'	'1 year 4 months	'	'	'	'0 years 6 months

Subsidiary_Guarantors_Condense

Subsidiary Guarantors - Condensed Consolidating Statements of Operations and Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales and service revenues	'	'	'	'
Product sales	$1,394	$1,367	$4,138	$4,224
Service revenues	243	229	744	661
Total sales and service revenues	1,637	1,596	4,882	4,885
Cost of sales and service revenues	'	'	'	'
Cost of product sales	1,123	1,187	3,366	3,578
Cost of service revenues	210	186	650	562
Income (loss) from operating investments, net	9	7	13	13
General and administrative expenses	186	164	541	506
Operating income (loss)	127	66	338	252
Interest expense	-28	-29	-87	-88
Earnings (loss) before income taxes	99	37	251	164
Federal income taxes	30	24	81	68
Net earnings (loss)	69	13	170	96
Other comprehensive income (loss), net of tax	18	17	148	45
Comprehensive income (loss)	87	30	318	141
Huntington Ingalls Industries, Inc.	'	'	'	'
Cost of sales and service revenues	'	'	'	'
Interest expense	-26	-28	-81	-83
Equity in earnings (loss) of subsidiaries	87	31	225	149
Earnings (loss) before income taxes	61	3	144	66
Federal income taxes	-8	-10	-26	-30
Net earnings (loss)	69	13	170	96
Other comprehensive income (loss), net of tax	18	17	148	45
Comprehensive income (loss)	87	30	318	141
Subsidiary Guarantors	'	'	'	'
Sales and service revenues	'	'	'	'
Product sales	1,394	1,367	4,138	4,224
Service revenues	243	229	744	661
Total sales and service revenues	1,637	1,596	4,882	4,885
Cost of sales and service revenues	'	'	'	'
Cost of product sales	1,123	1,187	3,366	3,578
Cost of service revenues	210	186	650	562
Income (loss) from operating investments, net	9	7	13	13
General and administrative expenses	186	164	541	506
Operating income (loss)	127	66	338	252
Interest expense	-2	-1	-6	-5
Earnings (loss) before income taxes	125	65	332	247
Federal income taxes	38	34	107	98
Net earnings (loss)	87	31	225	149
Other comprehensive income (loss), net of tax	18	17	148	45
Comprehensive income (loss)	105	48	373	194
Non-Guarantor Subsidiaries	'	'	'	'
Sales and service revenues	'	'	'	'
Service revenues	6	6	17	13
Total sales and service revenues	6	6	17	13
Cost of sales and service revenues	'	'	'	'
Cost of service revenues	6	6	17	13
Other comprehensive income (loss), net of tax	'	'	'	'
Eliminations	'	'	'	'
Sales and service revenues	'	'	'	'
Service revenues	-6	-6	-17	-13
Total sales and service revenues	-6	-6	-17	-13
Cost of sales and service revenues	'	'	'	'
Cost of service revenues	-6	-6	-17	-13
Equity in earnings (loss) of subsidiaries	-87	-31	-225	-149
Earnings (loss) before income taxes	-87	-31	-225	-149
Net earnings (loss)	-87	-31	-225	-149
Other comprehensive income (loss), net of tax	-18	-17	-148	-45
Comprehensive income (loss)	($105)	($48)	($373)	($194)

Subsidiary_Guarantors_Condense1

Subsidiary Guarantors - Condensed Consolidating Statements of Financial Position (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Current Assets	'	'	'	'
Cash and cash equivalents	$895	$1,057	$766	$915
Accounts receivable, net	1,055	905	'	'
Inventoried costs, net	340	288	'	'
Deferred income taxes	218	213	'	'
Prepaid expenses and other current assets	23	21	'	'
Total current assets	2,531	2,484	'	'
Property, plant, and equipment, net	1,964	2,034	'	'
Goodwill	881	881	'	'
Other purchased intangibles	532	548	'	'
Miscellaneous other assets	371	445	'	'
Total assets	6,279	6,392	'	'
Current Liabilities	'	'	'	'
Trade accounts payable	287	377	'	'
Accrued employees' compensation	205	235	'	'
Current portion of long-term debt	65	51	'	'
Current portion of postretirement plan liabilities	148	166	'	'
Current portion of workers' compensation liabilities	225	216	'	'
Advance payments and billings in excess of costs incurred	139	134	'	'
Other current liabilities	260	205	'	'
Condensed Other Accrued Liabilities, Current	333	'	'	'
Total current liabilities	1,402	1,384	'	'
Long-term debt	1,743	1,779	'	'
Pension plan liabilities	1,082	1,301	'	'
Other postretirement plan liabilities	656	799	'	'
Workers' compensation liabilities	409	403	'	'
Other long-term liabilities	52	59	'	'
Total liabilities	5,344	5,725	'	'
Stockholders' equity	935	667	'	'
Total liabilities and stockholders' equity	6,279	6,392	'	'
Huntington Ingalls Industries, Inc.	'	'	'	'
Current Assets	'	'	'	'
Cash and cash equivalents	894	1,056	765	915
Total current assets	894	1,056	'	'
Miscellaneous other assets	33	39	'	'
Investment in subsidiaries	2,618	2,282	'	'
Total assets	3,545	3,377	'	'
Current Liabilities	'	'	'	'
Current portion of long-term debt	65	51	'	'
Other current liabilities	8	25	'	'
Total current liabilities	73	76	'	'
Long-term debt	1,638	1,674	'	'
Intercompany liabilities	899	960	'	'
Total liabilities	2,610	2,710	'	'
Stockholders' equity	935	667	'	'
Total liabilities and stockholders' equity	3,545	3,377	'	'
Subsidiary Guarantors	'	'	'	'
Current Assets	'	'	'	'
Accounts receivable, net	1,055	905	'	'
Inventoried costs, net	340	288	'	'
Deferred income taxes	218	213	'	'
Prepaid expenses and other current assets	24	22	'	'
Total current assets	1,637	1,428	'	'
Property, plant, and equipment, net	1,964	2,034	'	'
Goodwill	881	881	'	'
Other purchased intangibles	532	548	'	'
Miscellaneous other assets	338	406	'	'
Intercompany receivables	899	960	'	'
Total assets	6,251	6,257	'	'
Current Liabilities	'	'	'	'
Trade accounts payable	287	377	'	'
Accrued employees' compensation	205	235	'	'
Current portion of postretirement plan liabilities	148	166	'	'
Current portion of workers' compensation liabilities	225	216	'	'
Advance payments and billings in excess of costs incurred	139	134	'	'
Other current liabilities	325	180	'	'
Total current liabilities	1,329	1,308	'	'
Long-term debt	105	105	'	'
Pension plan liabilities	1,082	1,301	'	'
Other postretirement plan liabilities	656	799	'	'
Workers' compensation liabilities	409	403	'	'
Other long-term liabilities	52	59	'	'
Total liabilities	3,633	3,975	'	'
Stockholders' equity	2,618	2,282	'	'
Total liabilities and stockholders' equity	6,251	6,257	'	'
Non-Guarantor Subsidiaries	'	'	'	'
Current Assets	'	'	'	'
Cash and cash equivalents	1	1	1	'
Prepaid expenses and other current assets	11	4	'	'
Total current assets	12	5	'	'
Total assets	12	5	'	'
Current Liabilities	'	'	'	'
Other current liabilities	12	5	'	'
Total current liabilities	12	5	'	'
Total liabilities	12	5	'	'
Stockholders' equity	'	'	'	'
Total liabilities and stockholders' equity	12	5	'	'
Eliminations	'	'	'	'
Current Assets	'	'	'	'
Prepaid expenses and other current assets	-12	-5	'	'
Total current assets	-12	-5	'	'
Investment in subsidiaries	-2,618	-2,282	'	'
Intercompany receivables	-899	-960	'	'
Total assets	-3,529	-3,247	'	'
Current Liabilities	'	'	'	'
Other current liabilities	-12	-5	'	'
Total current liabilities	-12	-5	'	'
Intercompany liabilities	-899	-960	'	'
Total liabilities	-911	-965	'	'
Stockholders' equity	-2,618	-2,282	'	'
Total liabilities and stockholders' equity	($3,529)	($3,247)	'	'

Subsidiary_Guarantors_Condense2

Subsidiary Guarantors - Condensed Consolidating Statements of Cash Flows (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions	'	'
Net cash provided by (used in) operating activities	($56)	($41)
Investing Activities	'	'
Additions to property, plant, and equipment	-85	-92
Proceeds from insurance settlement	58	'
Net cash provided by (used in) investing activities	-27	-92
Financing Activities	'	'
Repayment of long-term debt	-22	-22
Dividends paid	-15	'
Repurchases of common stock	-53	'
Proceeds from stock option exercises	6	6
Excess tax benefit related to stock-based compensation	5	'
Net cash provided by (used in) financing activities	-79	-16
Change in cash and cash equivalents	-162	-149
Cash and cash equivalents, beginning of period	1,057	915
Cash and cash equivalents, end of period	895	766
Huntington Ingalls Industries, Inc.	'	'
Condensed Financial Statements, Captions	'	'
Net cash provided by (used in) operating activities	-73	-76
Investing Activities	'	'
Proceeds from insurance settlement	'	'
Financing Activities	'	'
Repayment of long-term debt	-22	-22
Dividends paid	-15	'
Repurchases of common stock	-53	'
Proceeds from stock option exercises	6	6
Excess tax benefit related to stock-based compensation	'	'
Cash sweep/funding by parent	-5	-58
Net cash provided by (used in) financing activities	-89	-74
Change in cash and cash equivalents	-162	-150
Cash and cash equivalents, beginning of period	1,056	915
Cash and cash equivalents, end of period	894	765
Subsidiary Guarantors	'	'
Condensed Financial Statements, Captions	'	'
Net cash provided by (used in) operating activities	17	34
Investing Activities	'	'
Additions to property, plant, and equipment	-85	-92
Proceeds from insurance settlement	58	'
Net cash provided by (used in) investing activities	-27	-92
Financing Activities	'	'
Dividends paid	'	'
Repurchases of common stock	'	'
Excess tax benefit related to stock-based compensation	5	'
Cash sweep/funding by parent	5	58
Net cash provided by (used in) financing activities	10	58
Non-Guarantor Subsidiaries	'	'
Condensed Financial Statements, Captions	'	'
Net cash provided by (used in) operating activities	'	1
Investing Activities	'	'
Proceeds from insurance settlement	'	'
Financing Activities	'	'
Dividends paid	'	'
Repurchases of common stock	'	'
Excess tax benefit related to stock-based compensation	'	'
Change in cash and cash equivalents	'	1
Cash and cash equivalents, beginning of period	1	'
Cash and cash equivalents, end of period	1	1
Eliminations	'	'
Investing Activities	'	'
Proceeds from insurance settlement	'	'
Financing Activities	'	'
Dividends paid	'	'
Repurchases of common stock	'	'
Excess tax benefit related to stock-based compensation	'	'

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	Mar. 30, 2011	Sep. 30, 2013	Mar. 30, 2011	Mar. 30, 2011	Sep. 30, 2013	Mar. 30, 2011	Sep. 30, 2013	Mar. 30, 2011	Sep. 30, 2013
In Millions, unless otherwise specified	Term Loan	Term Loan	Term Loan	Revolving Credit Facility	Revolving Credit Facility	Swingline Loan Subfacility	Swingline Loan Subfacility	Letter of Credit	Letter of Credit
	Term Loan Due March 30, 2016	Term Loan Due March 30, 2016	HII Credit Facility	HII Credit Facility	HII Credit Facility	HII Credit Facility	HII Credit Facility	HII Credit Facility	HII Credit Facility
		Subsequent Event			Subsequent Event		Subsequent Event		Subsequent Event
Subsequent Event [Line Items]	'	'	'	'	'	'	'	'	'
Debt instrument, face amount	$575	$489	$575	'	'	'	'	'	'
Credit facility revolver	'	'	'	$650	$650	$100	$100	$350	$350