Huntington Ingalls Industries (HII) 10-K 18 Feb 16 2015 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Feb. 12, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,015
Entity Registrant Name	HUNTINGTON INGALLS INDUSTRIES, INC.
Entity Central Index Key	1,501,585
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		46,814,808
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 5,417
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Sales and service revenues
Product sales	$ 5,665	$ 5,712	$ 5,801
Service revenues	1,355	1,245	1,019
Total sales and service revenues	7,020	6,957	6,820
Cost of sales and service revenues
Cost of product sales	4,319	4,489	4,695
Cost of service revenues	1,198	1,051	888
Income (loss) from operating investments, net	10	11	14
General and administrative expenses	669	726	739
Goodwill Impairment	75	47
Operating income (loss)	769	655	512
Other income (expense)
Interest expense	(137)	(149)	(118)
Other, net		1
Earnings (loss) before income taxes	632	507	394
Federal income taxes	228	169	133
Net earnings (loss)	$ 404	$ 338	$ 261
Basic earnings (loss) per share	$ 8.43	$ 6.93	$ 5.25
Weighted-average common shares outstanding (in shares)	47.9	48.8	49.7
Diluted earnings (loss) per share	$ 8.36	$ 6.86	$ 5.18
Weighted-average diluted shares outstanding (in shares)	48.3	49.3	50.4
Other comprehensive income (loss)
Change in unamortized benefit plan costs	$ 34	$ (558)	$ 1,159
Other	(5)		4
Tax benefit (expense) for items of other comprehensive income	(12)	217	(458)
Other comprehensive income (loss), net of tax	17	(341)	705
Comprehensive income (loss)	$ 421	$ (3)	$ 966

Consolidated Statements of Fina

Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 894	$ 990
Accounts receivable, net	1,074	1,038
Inventoried costs, net	285	339
Prepaid expenses and other current assets	31	50
Total current assets	2,284	2,417
Land and land improvements	242	233
Buildings and leasehold improvements	1,579	1,498
Machinery and other equipment	1,315	1,240
Capitalized software costs	180	172
Property, plant and equipment, gross	3,316	3,143
Accumulated depreciation and amortization	(1,489)	(1,351)
Property, plant, and equipment, net	1,827	1,792
Other Assets
Goodwill	956	1,026
Other intangible assets, net	495	547
Pension plan assets		17
Long-term deferred tax assets	336	341
Miscellaneous other assets	126	99
Total other assets	1,913	2,030
Total assets	6,024	6,239
Current Liabilities
Trade accounts payable	317	269
Accrued employees' compensation	215	248
Current portion of long-term debt		108
Current portion of postretirement plan liabilities	143	143
Current portion of workers' compensation liabilities	227	221
Advance payments and billings in excess of revenues	125	74
Other current liabilities	247	249
Total current liabilities	1,274	1,312
Long-term debt	1,273	1,562
Pension plan liabilities	1,001	939
Other postretirement plan liabilities	423	507
Workers' compensation liabilities	460	449
Other long-term liabilities	103	105
Total liabilities	$ 4,534	$ 4,874
Commitments and Contingencies (Note 16)
Stockholders' Equity
Common stock	$ 1	$ 1
Additional paid-in capital	1,978	1,959
Retained earnings (deficit)	848	525
Treasury stock	(492)	(258)
Accumulated other comprehensive income (loss)	(845)	(862)
Total stockholders' equity	1,490	1,365
Total liabilities and stockholders' equity	$ 6,024	$ 6,239

Consolidated Statements Of Fin4

Consolidated Statements Of Financial Position (Parenthetical) - $ / shares shares in Millions	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150	150
Common stock, shares issued	52	51.5
Common stock, shares outstanding	46.9	48.3

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net earnings (loss)	$ 404	$ 338	$ 261
Adjustments to reconcile to net cash provided by (used in) operating activities
Depreciation	154	166	206
Amortization of purchased intangibles	26	28	20
Amortization of debt issuance costs	8	11	9
Stock-based compensation	43	34	44
Excess tax benefit related to stock-based compensation	(33)	(39)	(24)
Deferred income taxes	(15)	$ (22)	(28)
Proceeds from insurance settlement related to investing activities	(21)		(58)
Impairment of goodwill and intangible assets	102	$ 47
Loss on early extinguishment of debt	44	37
Change in
Accounts receivable	(41)	140	(218)
Inventoried costs	54	53	51
Prepaid expenses and other assets	(31)	7	(15)
Accounts payable and accruals	97	(86)	69
Retiree benefits	32	(4)	(86)
Other non-cash transactions, net	5	6	5
Net cash provided by (used in) operating activities	828	716	236
Investing Activities
Additions to property, plant, and equipment	(188)	(165)	(139)
Proceeds from disposition of assets	32
Acquisitions of businesses, net of cash received	(6)	(272)
Proceeds from insurance settlement related to investing activities	21		58
Net cash provided by (used in) investing activities	(141)	(437)	(81)
Financing Activities
Proceeds from issuance of long-term debt	600	600
Repayment of long-term debt	(995)	(679)	(51)
Debt issuance costs	(21)	(12)	(5)
Tender premiums and fees related to early extinguishment of debt	(33)	(31)
Dividends paid	(81)	(49)	(25)
Repurchases of common stock	(232)	(138)	(119)
Employee taxes on certain share-based payment arrangements	(54)	(64)
Proceeds from stock option exercises		2	7
Excess tax benefit related to stock-based compensation	33	39	24
Net cash provided by (used in) financing activities	(783)	(332)	(169)
Change in cash and cash equivalents	(96)	(53)	(14)
Cash and cash equivalents, beginning of period	990	1,043	1,057
Cash and cash equivalents, end of period	894	990	1,043
Supplemental Cash Flow Disclosure
Cash paid for income taxes	242	161	154
Cash paid for interest	96	113	109
Non-Cash Investing and Financing Activities
Capital expenditures accrued in accounts payable	$ 17	$ 9	$ 12

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2012	$ 667		$ 1,894		$ (1)	$ (1,226)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	261			$ 261
Dividends declared	(25)			(25)
Additional paid-in capital	31		31
Other comprehensive income (loss), net of tax	705					705
Common stock	1	$ 1
Treasury stock activity	(119)				(119)
Balance at Dec. 31, 2013	1,521	1	1,925	236	(120)	(521)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	338			338
Dividends declared	(49)			(49)
Additional paid-in capital	34		34
Other comprehensive income (loss), net of tax	(341)					(341)
Treasury stock activity	(138)				(138)
Balance at Dec. 31, 2014	1,365	1	1,959	525	(258)	(862)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	404			404
Dividends declared	(81)			(81)
Additional paid-in capital	19		19
Other comprehensive income (loss), net of tax	17					17
Treasury stock activity	(234)				(234)
Balance at Dec. 31, 2015	$ 1,490	$ 1	$ 1,978	$ 848	$ (492)	$ (845)

Consolidated Statements of Cha7

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Dividends declared per share	$ 0.50	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.20	$ 0.20	$ 0.20	$ 1.70	$ 1	$ 0.50

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2015
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. The Company conducts business primarily with the U.S. Government, principally the Department of Defense ("DoD"). As prime contractor, principal subcontractor, team member or partner, HII participates in many high-priority U.S. defense technology programs. HII is organized into three reportable segments: Ingalls, Newport News, and Other. 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 ("NSCs") 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. The Other segment was established in the second quarter of 2014 to account for certain of the Company's non-shipbuilding commercial activities.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Signifcant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation - The 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-K 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. Accounting Estimates - The preparation of the Company's 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 Bipartisan Budget Act of 2015 established budget top lines and provided sequestration relief for 2016 and 2017. Sequestration remains in effect for 2018 through 2021 and could result in significant decreases in DoD spending that could negatively impact the Company's revenues and its estimated recovery of goodwill and other long-lived assets. Revenue Recognition - The majority of the Company's business is derived from long-term contracts for the construction of naval vessels, production of goods, and provision of services to the federal government, principally the U.S. Navy. In accounting for these contracts, the Company extensively utilizes the cost-to-cost measure of the percentage-of-completion method of accounting, principally based upon total costs incurred. Under this method, sales, including estimated earned fees or profits, are recorded as costs are incurred, generally based on the percentage that total costs incurred bear to total estimated costs at completion. For certain contracts that provide for deliveries of a substantial number of similar units, sales are accounted for using units of delivery as the basis to measure progress toward completion. Certain contracts contain provisions for price redetermination or for cost and/or performance incentives. Such redetermined amounts or incentives are included in sales when the amounts can reasonably be determined and estimated. Amounts representing contract change orders, claims, requests for equitable adjustment, or limitations in funding are included in sales only when they can be reliably estimated and realization is probable. The Company is accounting for one of its contracts under the percentage-of-completion method based on a zero profit margin and will continue such accounting until results can be estimated more precisely. Revenues related to this contract represent less than 1% of the Company's total revenues for 2015 . The Company estimates profit as the difference between total estimated revenues and total estimated cost of a contract and recognizes that profit over the life of the contract based on progress toward completion. If the Company estimates a contract will result in a loss, the full amount of the estimated loss is recognized against income in the period in which the loss is identified. The Company classifies contract revenues as product sales or service revenues depending upon the predominant attributes of the relevant underlying contracts. 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. Accordingly, 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 years ended December 31, 2015 , 2014 , and 2013 , net cumulative catch-up adjustments increased operating income by $239 million , $222 million and $113 million , respectively, and increased diluted earnings per share by $3.21 , $2.93 and $1.46 , respectively. No individual adjustment was material to the Company's consolidated statements of operations and comprehensive income in any of these periods. The Company also enters into other types of contracts, including certain services or commercial arrangements. For such contracts not associated with the design, development, manufacture, or modification of complex equipment, revenues are recognized upon delivery or as services are rendered once persuasive evidence of an arrangement exists, the price is fixed or determinable, and collectibility is reasonably assured. Costs related to these contracts are expensed as incurred. General and Administrative Expenses - In accordance with industry practice and regulations that govern the cost accounting requirements for government contracts, most general corporate expenses incurred at both the segment and corporate locations are allowable and allocable costs on government contracts. These costs are allocated to contracts in progress on a systematic basis, and contract performance factors include this as an element of cost. General and administrative expenses also include certain other costs that are not allocable to government contracts, primarily consisting of the FAS/CAS Adjustment and the provision for deferred state income taxes. The FAS/CAS Adjustment reflects the difference between pension and postretirement benefits expenses determined in accordance with U.S. Financial Accounting Standards ("FAS") and pension and postretirement benefit expenses allocated to individual contracts in accordance with U.S. Cost Accounting Standards ("CAS"). Deferred state income taxes reflect the change in deferred state tax assets and liabilities in the period. Research and Development - Company-sponsored research and development activities primarily include independent research and development ("IR&D") related to experimentation, design, development, and test activities for government programs. IR&D expenses are included in general and administrative expenses and are generally allocable to government contracts. Company-sponsored IR&D expenses totaled $19 million , $18 million and $22 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Expenses for research and development sponsored by the customer are charged directly to the related contracts. Product Warranty Costs - The Company provides certain product warranties that require repair or replacement of non-conforming items for a specified period of time often subject to a specified monetary coverage limit. The Company's product warranties are provided under government contracts, the costs of which are immaterial and are included in contract costs for purposes of using the percentage-of-completion method of accounting. Environmental Costs - Environmental liabilities are accrued when the Company determines remediation costs are probable and such amounts are reasonably estimable. When only a range of amounts is established and no amount within the range is more probable than another, the minimum amount in the range is recorded. Environmental liabilities are recorded on an undiscounted basis and are not material. Environmental expenditures are expensed or capitalized as appropriate. Capitalized expenditures, if any, relate to long-lived improvements in currently operating facilities. The Company does not record insurance recoveries before collection is probable and, as of December 31, 2015 and 2014 , did not have any accrued receivables related to insurance reimbursements or recoveries for environmental matters. Fair Value of Financial Instruments - The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The accounting standard provides a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available. The three levels of inputs consist of: Level 1: Quoted prices in active markets for identical assets and liabilities. Level 2: Observable inputs, other than Level 1 prices, such as: quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or that the Company corroborates with observable market data for substantially the full term of the related assets or liabilities. Level 3: Unobservable inputs supported by little or no market activity that are significant to the fair value of the assets and liabilities. Except for the Company's long-term debt, the carrying amounts of the Company's financial instruments recorded at historical cost approximate fair value due to the short-term nature of the instruments and low credit risk associated with the respective counterparties. The Company maintains multiple grantor trusts established to fund certain non-qualified pension plans. These trusts consist primarily of available-for-sale investments in marketable securities. The assets are held at fair value, a significant majority of investments held in the trusts are valued within Level 1 of the fair value hierarchy, and no material amounts are valued within Level 3 of the fair value hierarchy. These trusts were valued at $74 million and $45 million as of December 31, 2015 and 2014 , respectively, and are presented within miscellaneous other assets within the consolidated statements of financial position. Foreign Currency Translation - The Company's international subsidiaries that do not have the U.S. dollar as their functional currency translate assets and liabilities at current rates of exchange in effect at the balance sheet date. Revenues and expenses from these international subsidiaries are translated using the monthly average exchange rates in effect for the periods in which the items occur. The cumulative foreign currency translation gains and losses are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Gains and losses from foreign currency transactions are included in other income (expense) in the consolidated statements of operations and comprehensive income. Such amounts are not material. Asset Retirement Obligations - Environmental remediation and/or asset decommissioning may be required when the Company ceases to utilize certain facilities. The Company records, within other current liabilities or other long-term liabilities as appropriate, all known asset retirement obligations for which the liability's fair value can be reasonably estimated, including certain asbestos removal, asset decommissioning, and lease restoration obligations. The changes in the asset retirement obligation carrying amounts for the years ended December 31, 2015 , 2014 , and 2013 , were as follows: ($ in millions) Asset Retirement Obligations Balance as of December 31, 2012 $ 25 Obligation relating to the future retirement of a facility — Revision of estimate — Accretion expense — Balance as of December 31, 2013 25 Obligation relating to the future retirement of a facility — Revision of estimate (2 ) Accretion expense (1 ) Balance as of December 31, 2014 22 Liabilities settled (4 ) Obligation relating to the future retirement of a facility — Revision of estimate (1 ) Accretion expense 1 Balance as of December 31, 2015 $ 18 The Company also has known conditional asset retirement obligations related to assets currently in use, including certain asbestos remediation and asset decommissioning activities to be performed in the future, that were not reasonably estimable as of December 31, 2015 , due to insufficient information about the timing and method of settlement of the obligation. Accordingly, the fair value of these obligations has not been recorded in the consolidated financial statements. In addition, there may be conditional environmental asset retirement obligations that the Company has not yet discovered. Income Taxes - Income tax expense and other related information are based on the prevailing statutory rates for U.S. federal income taxes and the composite state income tax rate for the Company for each period presented. Deferred state income taxes reflect the change in deferred state tax assets and liabilities in the relevant period. These amounts are recorded within operating income, while the current period state income tax expense is charged to contract costs and included in cost of sales and service revenues in segment operating income. Deferred income taxes are recorded when revenues and expenses are recognized in different periods for financial statement purposes than for tax return purposes. Deferred tax asset or liability account balances are calculated at the balance sheet date using current tax laws and rates expected to be in effect when the deferred tax items reverse in future periods. The Company recognizes deferred tax assets to the extent it believes that these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. Based on the Company's evaluation of these deferred tax assets, valuation allowances of $11 million and $14 million were deemed necessary as of December 31, 2015 and 2014 , respectively. Uncertain tax positions meeting the more-likely-than-not recognition threshold, based on the merits of the position, are recognized in the financial statements. The Company recognizes the amount of tax benefit that is greater than 50% likely to be realized upon ultimate settlement with the related tax authority. If a tax position does not meet the minimum statutory threshold to avoid payment of penalties, the Company recognizes an expense for the amount of the penalty in the period the tax position is claimed or expected to be claimed in its tax return. Penalties and accrued interest related to uncertain tax positions are recognized as a component of income tax expense. Changes in accruals associated with uncertain tax positions are recorded in earnings in the period in which they are determined. Cash and Cash Equivalents - The carrying amounts of cash and cash equivalents approximate fair value due to the short-term nature of these assets, which have original maturity dates of 90 days or less. Concentration Risk - The Company’s assets that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents. The Company places its cash and cash equivalents with reputable financial institutions and limits the amount of credit exposure with any one of them. The Company regularly evaluates the creditworthiness of these financial institutions and minimizes this credit risk by entering into transactions with high-quality counterparties, limiting the exposure to each counterparty, and monitoring the financial condition of its counterparties. In connection with its U.S. Government contracts, the Company is required to procure certain raw materials, components, and parts from supply sources approved by the U.S. Government. As a result of consolidation in the defense industry, only one supplier exists for certain components and parts required to manufacture the Company's products. Accounts Receivable - Accounts receivable include amounts billed and currently due from customers, amounts currently due but unbilled, certain estimated contract change amounts, claims or requests for equitable adjustment in negotiation that are probable of recovery, and amounts retained by the customer pending contract completion. Inventoried Costs - Inventoried costs primarily relate to work in process under contracts that recognize revenues using labor dollars or units of delivery as the basis of the percentage-of-completion calculation. These costs represent accumulated contract costs less cost of sales as calculated using the percentage-of-completion method, not in excess of recoverable value. Accumulated contract costs include direct production costs, factory and engineering overhead, production tooling costs, and, for government contracts, allowable general and administrative expenses. Under the Company's U.S. Government contracts, the customer asserts title to, or a security interest in, inventories related to such contracts as a result of contract advances, performance-based payments, and progress payments. In accordance with industry practice, inventoried costs are classified as a current asset and include amounts related to contracts having production cycles longer than one year. Inventoried costs also include company owned raw materials, which are stated at the lower of cost or market, generally using the average cost method. Advance Payments and Billings in Excess of Revenues - Payments received in excess of inventoried costs and revenues are recorded as advance payment liabilities. Property, Plant, and Equipment - Depreciable properties owned by the Company are recorded at cost and depreciated over the estimated useful lives of individual assets. Major improvements are capitalized while expenditures for maintenance, repairs, and minor improvements are expensed. Costs incurred for computer software developed or obtained for internal use are capitalized and amortized over the expected useful life of the software, not to exceed nine years. Leasehold improvements are amortized over the shorter of their useful lives or the term of the lease. The remaining assets are depreciated using the straight-line method, with the following lives: Years Land improvements 3 - 40 Buildings and improvements 3 - 60 Capitalized software costs 3 - 9 Machinery and other equipment 2 - 45 The Company evaluates the recoverability of its property, plant, and equipment when there are changes in economic circumstances or business objectives that indicate the carrying value may not be recoverable. The Company's evaluations include estimated future cash flows, profitability, and other factors affecting fair value. As these assumptions and estimates may change over time, it may or may not be necessary to record impairment charges. Leases - The Company uses its incremental borrowing rate in the assessment of lease classification as capital or operating and defines the initial lease term to include renewal options determined to be reasonably assured. The Company conducts operations primarily under operating leases. Many of the Company's real property lease agreements contain incentives for tenant improvements, rent holidays, or rent escalation clauses. For incentives for tenant improvements, the Company records a deferred rent liability and amortizes the deferred rent over the term of the lease as a reduction to rent expense. For rent holidays and rent escalation clauses during the lease term, the Company records minimum rental expenses on a straight-line basis over the term of the lease. For purposes of recognizing lease incentives, the Company uses the date of initial possession as the commencement date, which is generally the date on which the Company is given the right of access to the space and begins to make improvements in preparation for the intended use. Goodwill and Other Intangible Assets - The Company performs impairment tests for goodwill as of November 30 of each year and between annual impairment tests if evidence of potential impairment exists, by first comparing the carrying value of net assets to the fair value of the related operations. If the fair value is determined to be less than the carrying value, a second step is performed to determine if goodwill is impaired, by comparing the estimated fair value of goodwill to its carrying value. Purchased intangible assets are amortized on a straight-line basis or a method based on the pattern of benefits over their estimated useful lives, and the carrying value of these assets is reviewed for impairment when events indicate that a potential impairment may have occurred. Equity Method Investments - Investments in which the Company has the ability to exercise significant influence over the investee but does not own a majority interest or otherwise control are accounted for under the equity method of accounting and included in other assets in its consolidated statements of financial position. The Company's equity investments align strategically and are integrated with the Company's operations, and therefore the Company's share of the net earnings or losses of the investee is included in operating income (loss). The Company evaluates its equity investments for other than temporary impairment whenever events or changes in business circumstances indicate that the carrying amounts of such investments may not be fully recoverable. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period. Self-Insured Group Medical Insurance - The Company maintains a self-insured group medical insurance plan. The plan is designed to provide a specified level of coverage for employees and their dependents. Estimated liabilities for incurred but not paid claims utilize actuarial methods based on various assumptions, which include, but are not limited to, HII's historical loss experience and projected loss development factors. These liabilities are recorded in other current liabilities and account for less than 5% of the total current liabilities balance. Self-Insured Workers' Compensation Plan - The operations of the Company are subject to federal and state workers' compensation laws. The Company maintains self-insured workers' compensation plans, in addition to participating in federally administered second injury workers' compensation funds. The Company estimates the required liability of claims and funding requirements on a discounted basis utilizing actuarial methods based on various assumptions, which include, but are not limited to, the Company's historical loss experience and projected loss development factors as compiled in an annual actuarial study. Self-insurance accruals include amounts related to the liability for reported claims and an estimated accrual for claims incurred but not reported. The Company's workers' compensation liability was discounted at 2.12% and 2.48% as of December 31, 2015 and 2014 , respectively. These discount rates were determined using a risk-free rate based on future payment streams. Workers' compensation benefit obligations on an undiscounted basis were $825 million and $846 million as of December 31, 2015 and 2014 , respectively. Litigation, Commitments, and Contingencies - Amounts associated with litigation, commitments, and contingencies are recorded as charges to earnings when management, after taking into consideration the facts and circumstances of each matter, including any settlement offers, has determined that it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Restructuring - The Company has recorded accruals in conjunction with its restructuring activities in other current liabilities. These accruals include estimates primarily related to facility consolidations and closures, asset retirement obligations, long-lived asset write-downs, employment reductions, and contract termination costs. Actual costs may vary from these estimates. Restructuring related accruals are reviewed and adjusted when circumstances require such a change. Retirement Related Benefit Costs - The Company accounts for its retirement related benefit plans on the accrual basis. The measurements of obligations, costs, assets, and liabilities require significant judgment. The costs of benefits provided by defined benefit pension plans are recorded in the period participating employees provide service. The costs of benefits provided by other postretirement benefit plans are recorded in the period participating employees attain full eligibility. The discount rate assumption is defined under GAAP as the rate at which a plan's obligation could be effectively settled. The discount rate is established for each of the retirement related benefit plans at its respective measurement date. The expected return on plan assets component of retirement related costs is used to calculate net periodic expense. Unless plan assets and benefit obligations are subject to remeasurement during the year, the expected return on assets is based on the fair value of plan assets at the beginning of the year. The costs of plan amendments that provide benefits already earned by plan participants (prior service costs and credits) are deferred in accumulated other comprehensive income and amortized over the expected period the employees provide service as of the date of amendment. Actuarial gains and losses arising from differences from actual experience or changes in assumptions are deferred in accumulated other comprehensive income. This unrecognized amount is amortized to the extent it exceeds 10% of the greater of the plan's benefit obligation or plan assets. The amortization period for actuarial gains and losses is the estimated remaining service life of the plan participants, which is approximately 12 years . The Company recognizes the funded status of each retirement related benefit plan as an asset or liability in its consolidated statements of financial position. The funded status represents the difference between the plan's benefit obligation and the fair value of the plan's assets. Unrecognized deferred amounts, such as demographic or asset gains or losses and the impacts of plan amendments, are included in accumulated other comprehensive income and amortized as described above. Stock Compensation - Stock-based compensation value is determined based on the closing market price of the Company's common stock on grant date, and the expense is recognized over the vesting period. At each reporting date, the number of shares is adjusted to equal the number ultimately expected to vest based on the Company's expectations regarding the relevant performance and service criteria. Related Party Transactions - On March 29, 2011, HII entered into a Separation and Distribution Agreement (the "Separation 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. 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. In connection with the spin-off, HII entered into a Tax Matters Agreement with Northrop Grumman related to taxes prior to the spin-off as described in Note 13: Income Taxes. As of December 31, 2015 and 2014 , the Company was due $31 million and $28 million , respectively, from Northrop Grumman under the Tax Matters Agreement. As of December 31, 2015 and 2014 , the Company had $84 million outstanding under Industrial Revenue Bonds issued by the Mississippi Business Finance Corporation. Prior to the spin-off, repayment of principal and interest was guaranteed by Northrop Grumman Systems Corporation. The guaranty remains in effect, and the Company has agreed to indemnify Northrop Grumman Systems Corporation for any losses related to the guaranty.

Accounting Standards Updates

Accounting Standards Updates	12 Months Ended
	Dec. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Standards Updates	ACCOUNTING STANDARDS UPDATES In November 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-17, "Income Taxes (Topic 740)." The amendments in this update require that entities with a classified balance sheet present deferred tax liabilities and assets as noncurrent components. Classifying all deferred taxes as noncurrent will simplify the process, with no requirement to separately identify the net current and net noncurrent deferred tax asset or liability and allocate valuation allowances. The Company elected to early adopt ASU 2015-17 retrospectively as of December 31, 2015, and therefore reclassified deferred tax assets totaling $129 million to long-term deferred tax assets as of December 31, 2014. In July 2015, the FASB issued ASU 2015-11, "Inventory (Topic 330)." The update requires entities to measure inventory "at the lower of cost and net realizable value," simplifying previous guidance under which inventory must be measured at the lower of cost or market. For inventory within the scope of the ASU, entities will be required to compare the cost of inventory to only one measure, its net realizable value. When evidence exists that the net realizable value of inventory is less than its cost, entities will recognize the difference as a loss in earnings in the period in which it occurs. The standard is effective for public entities for annual reporting periods beginning after December 15, 2016, and interim periods within those periods. The Company does not expect the adoption of ASU 2015-11 to have a material impact on the Company's consolidated financial position, results of operations, or cash flows. In May 2015, the FASB issued ASU 2015-07, "Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities that Calculate Net Asset Value ("NAV") per Share (or Its Equivalent)." The update removes the requirement to categorize within the fair value hierarchy investments whose values are measured at NAV, or its equivalent. Instead, entities will be required to disclose the fair value of such investments so that financial statement users can reconcile amounts reported in the fair value hierarchy table and the amounts reported on the balance sheet. The updated guidance is effective for annual and interim periods beginning after December 15, 2015, with early adoption permitted. The Company does not expect the adoption of ASU 2015-07 to have a material impact on the Company's consolidated financial position, results of operations, or cash flows. In April 2015, FASB issued ASU 2015-03, "Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs." The update requires the presentation of capitalized debt issuance costs as a direct reduction of the related debt liability, consistent with the current required presentation of debt discounts. In August 2015, the FASB issued ASU 2015-15, which addresses the lack of guidance regarding line-of-credit arrangements in ASU 2015-03. The update clarifies the SEC staff's position, indicating that for line-of-credit arrangements, it would "not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement." The Company elected to early adopt ASU 2015-03 and ASU 2015-15 as of December 31, 2015. The adoption of ASU 2015-03 resulted in the presentation of $32 million of debt issuance costs as a reduction of long-term debt as of December 31, 2015. The Company retrospectively adjusted the December 31, 2014, consolidated statements of financial position and related disclosures to reflect the reclassification of $30 million of debt issuance costs between miscellaneous other assets and long-term debt. In February 2015, the FASB issued ASU 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis.” The amendment eliminates the deferral of certain consolidation standards for entities considered to be investment companies and requires reporting entities to reevaluate consolidation conclusions in respect of variable interest entities, limited partnerships, and related party groups. It also provides clarity for determining whether equity holders have power over an entity. The amendment is effective for annual and interim periods beginning after December 15, 2015. The Company plans to adopt this guidance in the first quarter of fiscal 2016. The Company does not expect the adoption of ASU 2015-02 to have a material impact on the Company's consolidated financial position, results of operations, or cash flows. In May 2014, the FASB issued the final standard on revenue from contracts with customers. The standard, issued as ASU 2014-09, outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry- specific guidance. The core principle of the standard is that "an entity shall recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services." The guidance permits the use of either a retrospective or cumulative effect transition method. In August 2015, the FASB issued ASU 2015-14, which defers the effective date of the new revenue recognition standard by one year. Based on ASU 2015-14, public entities will apply the new revenue standard to annual reporting periods beginning after December 15, 2017, but early adoption for annual reporting periods beginning after December 31, 2016, will be permitted. The Company has determined not to early adopt the standard as it continues to evaluate the transition methods and has not yet determined the impacts that will result from the implementation of ASU 2014-09 on its financial statements and disclosures, contracting and accounting processes, internal controls, and information technology systems. Other pronouncements issued but not effective until after December 31, 2015, are not expected to have a material effect on the Company's financial position, results of operations, or cash flows.

Avondale

Avondale	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Avondale	AVONDALE In 2010, plans were announced to consolidate the Company's Ingalls shipbuilding operations by winding down shipbuilding at the Avondale, Louisiana facility in 2013 after completion of LPD-class ships that were under construction at this facility. In October 2014, the Company ceased shipbuilding construction operations at the Avondale facility. 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 shipbuilding at the Avondale 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. The Company believes such costs should 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 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 certain costs submitted by the Company. In July 2014, the Company received a letter from the Supervisor of Shipbuilding requesting that the Company revise its restructuring proposal to address certain documentation issues identified by the DCAA in order for the Government to make an adequate evaluation of the restructuring proposal. In August 2014, the Company received a letter from the Supervisor of Shipbuilding proposing a joint meeting regarding the treatment of specific costs included in the restructuring proposal and acknowledging that the allowability and allocability of costs will be determined by the Government in an Advanced Agreement in accordance with FAR. The Company submitted a revised proposal in March 2015 to address the concerns of the DCAA and to reflect a revised estimated total cost of $287 million . In July 2015, the Company received a letter from the Supervisor of Shipbuilding requesting that the Company either provide cost estimates to address the Company’s positions related to restructure or file a dispute. The Company responded in July 2015 by addressing the matters raised by the Supervisor of Shipbuilding and recommending the parties continue efforts to seek a mutual resolution. In August 2015, the Company received a letter from the Supervisor of Shipbuilding's Contracting Officer ("Contracting Officer"), with a preliminary determination that the Company’s method of allocating as indirect costs certain employee retention and incentive expenses, which could be up to $57 million , did not comply with cost accounting allocation regulations. The Company responded in September 2015 with its basis supporting its cost allocation positions and sought a determination that supports the Company’s method of cost allocation. Although the Company cannot predict what the Contracting Officer will determine, the Company anticipates a resolution 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 Contracting Officer may, however, disagree with the Company’s cost allocation method, and any subsequent inability to recover costs substantially in accordance with management’s cost recovery expectations could result in a material effect on the Company's consolidated financial position, results of operations, or cash flows. In 2014, the Company 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 impact of a curtailment and other resulting adjustments in these plans was not material to its consolidated financial position, results of operations, or cash flows. The following table summarizes the changes in the Company's liability for restructuring and shutdown related costs associated with winding down the Avondale facility. These costs were comprised primarily of employee severance and retention payments, as well as incentive bonuses. As of December 31, 2015 and 2014 , $169 million and $212 million , respectively, of restructuring and shutdown related costs were capitalized in inventoried costs. As of December 31, 2015 and 2014 , $82 million and $48 million , respectively, of accounts receivable were related to restructuring and shutdown related costs. For the years ended December 31, 2015 and 2014 , the Company expensed $55 million and $57 million , respectively, of these costs as part of general and administrative expenses. ($ in millions) Total Balance as of December 31, 2012 $ 24 Payments (27 ) Adjustments 17 Balance as of December 31, 2013 14 Payments (15 ) Adjustments 1 Balance as of December 31, 2014 — Balance as of December 31, 2015 $ —

Gulfport

Gulfport	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Gulfport	GULFPORT In September 2013, the Company announced the closure of its Gulfport Composite Center of Excellence in Gulfport, Mississippi, part of the Ingalls reportable segment, which it completed in August 2014. In connection with this closure, the Company incurred total costs of $54 million , consisting of $52 million in accelerated depreciation of fixed assets and $2 million in personnel, facility shutdown, and other related costs. In July 2014, the Company received a letter from the Supervisor of Shipbuilding taking exception to the Company's treatment of the Gulfport closure costs. In April 2015, the Company submitted recommended accounting alternatives, which the U.S. Government is currently evaluating. The Company anticipates a resolution that is substantially in accordance with management's cost recovery expectations. Any inability, however, to recover Gulfport closure costs could result in a material effect on the Company's consolidated financial position, results of operations, or cash flows. As of December 31, 2015 , and 2014 , $35 million and $37 million , respectively, of accounts receivable were related to Gulfport closure costs. In March 2015, the Company sold the Gulfport Composite Center of Excellence to the Mississippi State Port Authority for $32 million , resulting in a gain on disposition of $9 million , recorded as a reduction to contract costs in accordance with the terms of the Company’s contracts with the U.S. Government.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	ACQUISITIONS On January 30, 2015, the Company acquired, for approximately $6 million in cash, the assets of the Engineering Solutions Division ("ESD") of The Columbia Group. ESD, a leading designer and builder of unmanned underwater vehicles for domestic and international customers, is operating as the Undersea Solutions Group ("USG"). As the U.S. Navy increases employment of unmanned vehicles in both the surface and undersea domains, this acquisition enhances the Company's ability to compete in these markets. In connection with this acquisition, the Company recorded $4 million of goodwill, all of which was allocated to its Newport News segment, primarily attributed to USG's specialized and skilled employees, and $1 million of intangible assets, primarily related to technology. See Note 12: Goodwill and Other Intangible Assets. The assets, liabilities, and results of operations of USG are not material to the Company’s consolidated financial position, results of operations, or cash flows. On May 30, 2014, the Company acquired, for approximately $225 million in cash, net of $5 million of cash acquired, UniversalPegasus International Holdings, Inc. ("UPI"), a provider of project management, engineering and construction management services to the oil and gas industry. The acquisition was consistent with the Company's strategy to utilize its engineering and energy related expertise to expand its position in energy infrastructure markets. In connection with this acquisition, the Company recorded $150 million of goodwill, all of which was allocated to its Other segment, primarily related to the value of UPI’s workforce, and $41 million of intangible assets related to contractual relationships and trade names. See Note 12: Goodwill and Other Intangible Assets. Adjustments to the fair value of assets acquired and liabilities assumed since the acquisition date were not material and were primarily driven by the finalization of the net working capital adjustment and refinement of fair value calculations for certain assets and liabilities. The assets, liabilities, and results of operations of UPI are not material to the Company’s consolidated financial position, results of operations, or cash flows. On January 2, 2014, the Company acquired, for approximately $47 million in cash, net of $6 million of cash acquired, The S.M. Stoller Corporation, renamed as Stoller Newport News Nuclear, Inc. ("SN3"), a provider of environmental, nuclear, and technical consulting and engineering services to the Department of Energy, Department of Defense, and private sector. The acquisition was consistent with the Company's strategy to utilize its nuclear and energy related expertise developed through its shipbuilding activities to expand its position in the energy marketplace. In connection with this acquisition, the Company recorded $42 million of goodwill, all of which was allocated to its Newport News segment, primarily attributed to SN3’s specialized and skilled employees, and $6 million of intangible assets, primarily related to existing contract backlog and trade names. See Note 12: Goodwill and Other Intangible Assets. The assets, liabilities, and results of operations of SN3 are not material to the Company’s consolidated financial position, results of operations, or cash flows. The Company funded each of these acquisitions using cash on hand. The acquisition costs incurred in connection with these acquisitions were not material. The operating results of these businesses have been included in the Company’s consolidated results as of the respective closing dates of the acquisitions. In allocating the purchase price of these businesses, the Company considered the estimated fair value of net tangible and intangible assets acquired, with any excess purchase price recorded as goodwill. The total amount of goodwill resulting from these acquisitions expected to be deductible for tax purposes was $96 million . These acquisitions are not material either individually or in the aggregate, and pro forma revenues and results of operations have therefore not been provided.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY Common Stock - Changes in the Company's number of outstanding shares for the year ended December 31, 2015 , resulted from shares purchased in the open market under the Company's stock repurchase program and share activity under its stock compensation plans. See Note 19: Stock Compensation Plans. Treasury Stock - In October 2013, the Company's board of directors authorized an increase in the Company's existing stock repurchase program from $150 million to $300 million and an extension of the term of the program to October 31, 2017. In October 2014, the Company's board of directors authorized an increase in the stock repurchase program from $300 million to $600 million and an extension of the term of the program to October 31, 2019. In October 2015, the Company's board of directors authorized an increase in the stock repurchase program from $600 million to $1,200 million . Repurchases are made from time to time at management's discretion in accordance with applicable federal securities laws. For the year ended December 31, 2015 , the Company repurchased 1,987,550 shares at a cost of $234 million , of which approximately $2 million was not yet settled for cash as of December 31, 2015 . For the years ended December 31, 2014 and 2013 , the Company repurchased 1,407,729 , and 1,722,991 shares, respectively, at a cost of $138 million and $119 million , respectively. The cost of purchased shares is recorded as treasury stock in the consolidated statements of financial position. Dividends - In October 2015, the Company's board of directors authorized an increase in the Company's quarterly cash dividend from $0.40 per share to $0.50 per share. The Company paid cash dividends totaling $81 million ( $1.70 per share), $49 million ( $1.00 per share), and $25 million ( $0.50 per share) in the years ended December 31, 2015 , 2014 , and 2013 , respectively. Accumulated Other Comprehensive Income - 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 December 31, 2015 and 2014 , was comprised of unamortized benefit plan costs of $843 million and $864 million , respectively, and other comprehensive income items of $(2) million and $2 million , respectively. The changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2015 , 2014 and 2013 , were as follows: ($ in millions) Benefit Plans Other Total Balance as of December 31, 2012 $ (1,226 ) $ — $ (1,226 ) Other comprehensive income (loss) before reclassifications 1,028 4 1,032 Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (3 ) — (3 ) Amortization of net actuarial loss (gain) 1 134 — 134 Tax benefit (expense) for items of other comprehensive income (456 ) (2 ) (458 ) Net current period other comprehensive income (loss) 703 2 705 Balance as of December 31, 2013 (523 ) 2 (521 ) Other comprehensive income (loss) before reclassifications (603 ) — (603 ) Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (7 ) — (7 ) Amortization of net actuarial loss (gain) 1 52 — 52 Tax benefit (expense) for items of other comprehensive income 217 — 217 Net current period other comprehensive income (loss) (341 ) — (341 ) Balance as of December 31, 2014 (864 ) 2 (862 ) Other comprehensive income (loss) before reclassifications (53 ) (5 ) (58 ) Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (1 ) — (1 ) Amortization of net actuarial loss (gain) 1 88 — 88 Tax benefit (expense) for items of other comprehensive income (13 ) 1 (12 ) Net current period other comprehensive income (loss) 21 (4 ) 17 Balance as of December 31, 2015 $ (843 ) $ (2 ) $ (845 ) 1 These accumulated comprehensive income (loss) components are included in the computation of net periodic benefit cost. See Note 18: Employee Pension and Other Postretirement Benefits. The tax expense associated with amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015 , 2014 , and 2013 , was $30 million , $16 million , and $46 million , respectively.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Basic and diluted earnings per common share were calculated as follows: Year Ended December 31 (in millions, except per share amounts) 2015 2014 2013 Net earnings (loss) $ 404 $ 338 $ 261 Weighted-average common shares outstanding 47.9 48.8 49.7 Net effect of dilutive stock options and awards 0.4 0.5 0.7 Dilutive weighted-average common shares outstanding 48.3 49.3 50.4 Earnings (loss) per share - basic $ 8.43 $ 6.93 $ 5.25 Earnings (loss) per share - diluted $ 8.36 $ 6.86 $ 5.18 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 from the diluted share amounts presented above the effects of 0.3 million stock options and 0.7 million Restricted Performance Stock Rights ("RPSRs") for the year ended December 31, 2015 . The amounts presented above for the year ended December 31, 2014 , exclude the impact of 0.4 million stock options and 1.1 million RPSRs under the treasury stock method. The amounts presented above for the year ended December 31, 2013 , exclude the impact of 0.5 million stock options, 0.3 million Restricted Stock Rights ("RSRs"), and 1.0 million RPSRs under the treasury stock method.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company is organized into three reportable segments: Ingalls, Newport News and Other, consistent with how management makes operating decisions and assesses performance. The Other segment was established in the second quarter of 2014 to account for certain of the Company's non-shipbuilding commercial activities. U.S. Government Sales - Revenues from the U.S. Government include revenues from contracts for which HII is the prime contractor, as well as contracts for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The Company derives over 95% of its revenues from the U.S. Government. Assets - Substantially all of the Company's assets are located or maintained in the United States. Results of Operations by Segment Year Ended December 31 ($ in millions) 2015 2014 2013 Sales and Service Revenues Ingalls $ 2,188 $ 2,286 $ 2,441 Newport News 4,700 4,536 4,382 Other 134 137 — Intersegment eliminations (2 ) (2 ) (3 ) Total sales and service revenues $ 7,020 $ 6,957 $ 6,820 Operating Income (Loss) Ingalls $ 379 $ 229 $ 165 Newport News 422 415 402 Other (134 ) (59 ) — Total segment operating income (loss) 667 585 567 Non-segment factors affecting operating income (loss) FAS/CAS Adjustment 104 72 (61 ) Deferred state income taxes (2 ) (2 ) 6 Total operating income (loss) $ 769 $ 655 $ 512 Sales transactions between segments are generally recorded at cost. Goodwill and Intangible Asset Impairment Charges - The operating losses at the Other segment for the year ended December 31, 2015, reflect goodwill impairment charges of $75 million and intangible asset impairment charges of $27 million . The operating losses at the Other segment for the year ended December 31, 2014, reflect goodwill impairment charges of $47 million . Other Financial Information The following tables present, by segment, the Company's assets, capital expenditures, and depreciation and amortization. December 31 ($ in millions) 2015 2014 2013 Assets Ingalls $ 1,324 $ 1,452 1,663 Newport News 3,286 3,155 3,111 Other 78 210 — Corporate (1) 1,336 1,422 1,416 Total assets $ 6,024 $ 6,239 $ 6,190 (1) Includes $30 million and $35 million of debt issuance costs reclassified between miscellaneous other assets and long-term debt as of December 31, 2014 and 2013, respectively. Year Ended December 31 ($ in millions) 2015 2014 2013 Capital Expenditures Ingalls $ 53 $ 53 $ 44 Newport News 134 109 93 Other 1 3 — Corporate — — 2 Total capital expenditures $ 188 $ 165 $ 139 Year Ended December 31 ($ in millions) 2015 2014 2013 Depreciation and Amortization (1) Ingalls $ 65 $ 81 $ 125 Newport News 106 105 100 Other 9 8 — Corporate — — 1 Total depreciation and amortization $ 180 $ 194 $ 226 (1) Excluding amortization of debt issuance costs

Accounts Receivable, Net

Accounts Receivable, Net	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Accounts Receivable, Net	ACCOUNTS RECEIVABLE, NET Accounts receivable includes unbilled amounts that represent sales for which billings have not been presented to customers at year-end. These amounts are usually billed and collected within one year. Accounts receivable billed but not paid by customers under retainage provisions in long-term contracts were $24 million and $38 million as of December 31, 2015 and 2014 , respectively, substantially all of which were under U.S. Government contracts. Accounts receivable at December 31, 2015 , are expected to be collected in 2016 , except for approximately $121 million due in 2017 and $115 million due in or after 2018. Because the Company's accounts receivable are primarily with the U.S. Government or with companies acting as a contractor to the U.S. Government, the Company does not have material exposure to accounts receivable credit risk. Accounts receivable were composed of the following: December 31 ($ in millions) 2015 2014 Due From U.S. Government Amounts billed $ 197 $ 180 Recoverable costs and accrued profit on progress completed - unbilled 783 766 980 946 Due From Other Customers Amounts billed 39 64 Recoverable costs and accrued profit on progress completed - unbilled 59 35 98 99 Total accounts receivable 1,078 1,045 Allowances for doubtful accounts (4 ) (7 ) Total accounts receivable, net $ 1,074 $ 1,038

Inventoried Costs, Net

Inventoried Costs, Net	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventoried Costs, Net	INVENTORIED COSTS, NET Inventoried costs were composed of the following: December 31 ($ in millions) 2015 2014 Production costs of contracts in process $ 193 $ 248 Raw material inventory 92 91 Total inventoried costs, net $ 285 $ 339

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER 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. Reporting units are aligned with the Company's businesses. The Company’s testing approach utilizes a combination of discounted cash flow analysis and comparative market multiples to determine the fair values of its businesses for comparison to their corresponding book values. In connection with the Company’s annual goodwill impairment test as of November 30, 2015, management tested goodwill for each of its four reporting units. As a result of its annual goodwill impairment test, the Company determined that the estimated fair value of each reporting unit exceeded by more than 10% its corresponding carrying value as of November 30, 2015, except for the Oil and Gas reporting unit in the Other segment. While the November 30, 2015, annual impairment test did not result in an impairment, considering the limited excess fair value of goodwill over its carrying value in the Oil and Gas reporting unit and the continued decline in oil prices and related industry activity levels, the Company performed an interim assessment of goodwill as of December 31, 2015. The Company’s determination of fair value as of December 31, 2015, considered industry events that occurred in the period since its annual goodwill impairment test, as well as the updated long term outlook for this reporting unit. Those events included continued deterioration in the oil and gas markets, numerous industry-wide project deferrals, and capital spending cuts announced by industry leaders. The analysis concluded the fair value of this reporting unit was less than its carrying value as of December 31, 2015, and the Company recorded a goodwill impairment charge of $16 million at the Other segment in the fourth quarter of 2015. The Company continuously monitors industry events and changes in circumstances in the industries in which its reporting units conduct business. In consideration of the Oil and Gas reporting unit’s sensitivity to developments within its industry, the continued decline in crude oil prices, significant reductions in its customer capital spending plans, and project delays, management concluded that an interim goodwill impairment test was necessary to determine whether it was more likely than not that the fair value of its Oil and Gas reporting unit was still higher than its carrying value as of May 31, 2015. The Company's assessment considered the aforementioned changes to expectations that were considered as part of its annual goodwill impairment test as of November 30, 2014. As a result of its analysis, the Company recorded a $59 million goodwill impairment charge at the Other segment in the second quarter of 2015. In 2014, the Company recorded a $47 million goodwill impairment charge at its Other segment. The goodwill impairment charge was primarily driven by the drop in oil prices and the resulting decrease in industry market multiples. The Company determined that the estimated fair values of its remaining reporting units exceeded their corresponding carrying values as of November 30, 2014 . The Company determined that the estimated fair value of each reporting unit exceeded its corresponding carrying value as of November 30, 2013 . Accumulated goodwill impairment losses as of December 31, 2015 and 2014 , were $2,877 million and $2,802 million , respectively. The accumulated goodwill impairment losses for Ingalls as of each of December 31, 2015 , and 2014 , were $1,568 million . The accumulated goodwill impairment losses for Newport News as of each of December 31, 2015 , and 2014 , were $1,187 million . The accumulated goodwill impairment losses for the Other segment as of December 31, 2015 and 2014 , were $122 million and $47 million , respectively. For the year ended December 31, 2015, the Company recorded $4 million of goodwill related to its acquisition of USG. The Company recorded $150 million and $42 million of goodwill related to its acquisitions of UPI and SN3, respectively, in 2014. For the years ended December 31, 2015 and 2014 , the carrying amounts of goodwill changed as follows: ($ in millions) Ingalls Newport News Other Total Balance as of December 31, 2013 $ 175 $ 706 $ — $ 881 Acquisitions — 42 150 192 Goodwill impairment — — (47 ) (47 ) Balance as of December 31, 2014 175 748 103 1,026 Acquisitions — 4 — 4 Adjustments — — 1 1 Goodwill impairment — — (75 ) (75 ) Balance as of December 31, 2015 $ 175 $ 752 $ 29 $ 956 In the first quarter of 2014, the Company realigned its segments in order to optimize its operating structure. As a result, the net goodwill balance as of December 31, 2014, includes the reclassification of $23 million of goodwill from the Company's Ingalls segment to its Newport News segment. See Note 9: Segment Information for a full description of the segment realignments. None of these changes impacted the previously reported goodwill within each of the Company's reporting units. Other Intangible Assets The Company performs tests for impairment of long-lived assets whenever events or circumstances suggest that long-lived assets may be impaired. In December 2015, the Company performed an impairment test on the amortizable intangible assets that arose from the UPI acquisition, which reside in the Company’s Oil and Gas reporting unit within the Other segment. The Oil and Gas asset group’s long lived intangible assets consist primarily of customer relationships and, to a lesser degree, trade name and developed technology. The Company performed its impairment test considering the latest market conditions and expectations, as well as lower anticipated revenue and profitability. Based on the nature of UPI's intangible assets, the Company performed the recoverability test at the reporting unit level. In connection with the recoverability test, the Company reevaluated the remaining useful lives of the intangible assets and determined the total undiscounted pretax cash flows generated by the reporting unit over the remaining useful life of the primary asset, customer relationships. The carrying amount of the reporting unit was greater than the total undiscounted pretax cash flows, and, as a result, the intangible assets were written down by $27 million , charged against cost of sales and service revenues within income from operations at the Other segment, and the new carrying value was adjusted to be amortized using the pattern of benefits method over a weighted-average life of seven years. In connection with the USG purchase in 2015, the Company recorded $1 million of intangible assets pertaining to technology, to be amortized using the pattern of benefits method over a weighted-average life of 19 years . In connection with the UPI purchase in 2014, the Company recorded $41 million of intangible assets pertaining to existing contracts, trademarks, and trade names, to be amortized using the pattern of benefits method over a weighted-average life of 11 years . In connection with the SN3 purchase in 2014, the Company recorded $6 million of intangible assets pertaining to existing contract backlog, trademarks, and trade names, to be amortized using the pattern of benefits method over a weighted-average life of five years . The following table summarizes the Company's aggregate purchased intangible assets, which are primarily program related intangible assets. December 31 ($ in millions) 2015 2014 Gross carrying amount $ 987 $ 986 Impairment (27 ) — Accumulated amortization (465 ) (439 ) Net carrying amount $ 495 $ 547 The Company's purchased intangible assets are being amortized on a straight-line basis or a method based on the pattern of benefits over their estimated useful lives. Net intangible assets consist principally of amounts pertaining to nuclear-powered aircraft carrier and submarine program intangible assets, with an aggregate weighted-average useful life of 40 years based on the long life cycle of the related programs. Aggregate amortization expense for the years ended December 31, 2015 , 2014 and 2013 , was $26 million , $28 million and $20 million , respectively. The Company expects amortization for purchased intangible assets of $21 million in each of 2016, 2017 and 2018, and $20 million in each of 2019 and 2020.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company's earnings are principally domestic and its effective tax rate on earnings from operations for the year ended December 31, 2015 , was 36.1% , compared with 33.3% and 33.8% for 2014 and 2013 , respectively. For the year ended December 31, 2015 , the Company's effective tax rate differed from the federal statutory rate primarily as a result of the amount of the goodwill impairment that is not amortizable for tax purposes and other non-deductible expenses, partially offset by the domestic manufacturing deduction. For the year ended December 31, 2014 , the Company's effective tax rate differed from the federal statutory rate primarily as a result of the domestic manufacturing deduction, partially offset by the amount of the goodwill impairment that is not amortizable for tax purposes. For the year ended December 31, 2013, the Company's effective tax rate differed from the federal statutory rate primarily as a result of the domestic manufacturing deduction and enactment of the American Taxpayer Relief Act in January 2013, which retroactively extended the research and development tax credit through the end of 2013. The Company's effective tax rate for the year ended December 31, 2013, reflects the entire 2012 income tax benefit for the research and development tax credit, which expired at the end of 2011. Deferred state income taxes reflect the change in deferred state tax assets and liabilities in the relevant period. These amounts are recorded within operating income, while the current period state income tax expense is charged to contract costs and included in cost of sales and service revenues in segment operating income. In connection with the spin-off, HII entered into a Tax Matters Agreement with Northrop Grumman that governs the respective rights, responsibilities, and obligations of Northrop Grumman and the Company with respect to tax liabilities and benefits, tax attributes, tax contests, and other tax sharing regarding U.S. federal, state, local, and foreign income taxes, other taxes, and related tax returns. The Company is severally liable with Northrop Grumman for its income taxes for periods before the spin-off. HII is obligated to indemnify Northrop Grumman for tax adjustments that increase the Company's taxable income for periods before the spin-off and are of a nature that could result in a correlative reduction in HII's taxable income for periods after the spin-off. Northrop Grumman is obligated to indemnify HII for tax adjustments that decrease the Company's taxable income for periods before the spin-off and are of a nature that could result in a correlative increase in HII's taxable income for periods after the spin-off. These payment obligations only apply once the aggregate tax liability related to tax adjustments exceeds $5 million . Once the aggregate amount is exceeded, only the amount in excess of $5 million is ultimately required to be paid. In 2015 and prior years, HII incurred non-cash federal and state tax adjustments for items governed by the Tax Matters Agreement. The federal tax expense (benefit) adjustment is reported as a component of tax expense, while the state tax expense (benefit) adjustment is treated as an allowable cost in the applicable period under the terms of the Company's existing contracts and is included in general and administrative expenses. Federal income tax expense for the years ended December 31, 2015 , 2014 , and 2013 , consisted of the following: Year Ended December 31 ($ in millions) 2015 2014 2013 Income Taxes on Operations Federal income taxes currently payable $ 242 $ 191 $ 150 Change in deferred federal income taxes (14 ) (22 ) (17 ) Total federal income taxes $ 228 $ 169 $ 133 Income tax expense differed from the amount based on the statutory federal income tax rate applied to earnings (loss) before income taxes due to the following: Year Ended December 31 ($ in millions) 2015 2014 2013 Income tax expense (benefit) on operations at statutory rate $ 221 $ 178 $ 138 Goodwill impairment 11 6 — Manufacturing deduction (10 ) (9 ) (7 ) Research tax credit — — (2 ) Other, Net 6 (6 ) 4 Total federal income taxes $ 228 $ 169 $ 133 Unrecognized Tax Benefits - Unrecognized tax benefits represent the gross value of the Company's uncertain tax positions that have not been reflected in the consolidated statements of operations. If the income tax benefits from federal tax positions are ultimately realized, such realization would affect the Company's income tax expense, while the realization of state tax benefits would be recorded in general and administrative expenses. The changes in unrecognized tax benefits (exclusive of interest and penalties) for the years ended December 31, 2015 , 2014 , and 2013 are summarized in the following table: December 31 ($ in millions) 2015 2014 2013 Unrecognized tax benefits at beginning of the year $ 19 $ 11 $ 19 Additions based on tax positions related to the current year 8 5 5 Additions based on tax positions of prior years 3 3 1 Current year acquisitions — 4 — Reductions based on tax positions of prior years — — (14 ) Settlements (1 ) — — Statute of limitation expirations (2 ) (4 ) — Net change in unrecognized tax benefits 8 8 (8 ) Unrecognized tax benefits at end of the year $ 27 $ 19 $ 11 As of December 31, 2015 and 2014 , the estimated amount of the Company's uncertain tax positions, excluding interest and penalties, were liabilities of $27 million and $19 million , respectively. Assuming sustainment of these positions, as of December 31, 2015 and 2014 , the reversal of $17 million and $11 million , respectively, of the amounts accrued would favorably affect the Company's effective federal income tax rate in future periods. Accrued interest and penalties with respect to unrecognized tax benefits were $3 million as of each of December 31, 2015 and 2014 . During 2013, the Company recorded a reduction of $14 million to its liability for uncertain tax positions related to a change approved by the IRS for the allocation of interest costs to long term construction contracts at Ingalls. This change was made on a prospective basis only and did not impact the tax returns filed for years prior to 2013. The following table summarizes the tax years that are either currently under examination or remain open under the applicable statute of limitations and subject to examination by the major tax jurisdictions in which the Company operates: Jurisdiction Years United States 2007 - 2014 California 2010 - 2014 Louisiana 2012 - 2014 Mississippi 2012 - 2014 Virginia 2012 - 2014 Although the Company believes it has adequately provided for all uncertain tax positions, amounts asserted by taxing authorities could be greater than the Company's accrued position. Accordingly, additional provisions for federal and state income tax related matters could be recorded in the future as revised estimates are made or the underlying matters are effectively settled or otherwise resolved. Conversely, the Company could settle positions with the tax authorities for amounts lower than have been accrued. The Company believes that it is reasonably possible that during the next 12 months the Company's liability for uncertain tax positions may decrease by approximately $2 million due to statute of limitation expirations. The Company recognizes accrued interest and penalties related to uncertain tax positions in income tax expense. The IRS is currently conducting an examination of Northrop Grumman's consolidated tax returns, of which HII was part, for the years 2007 through the spin-off. During 2013 the Company entered into the pre-Compliance Assurance Process with the IRS for years 2011 and 2012. The Company is part of the IRS Compliance Assurance Process program for the 2014, 2015, and 2016 tax years. Open tax years related to state jurisdictions remain subject to examination. As of March 31, 2011, the date of the spin-off, the Company's liability for uncertain tax positions was approximately $4 million , net of federal benefit, which related solely to state income tax positions. Under the terms of the Separation Agreement, Northrop Grumman is obligated to reimburse HII for any settlement liabilities paid by HII to any government authority for tax periods prior to the spin-off, which include state income taxes. As a result, the Company recorded in other assets a reimbursement receivable of approximately $4 million , net of federal benefit, related to uncertain tax positions for state income taxes as of the date of the spin-off. In 2014, the statute of limitations expired for the $4 million liability related to state uncertain tax positions as of the spin-off date. Accordingly, the $4 million liability and the associated reimbursement receivable were written off. On September 13, 2013, the Treasury Department and the Internal Revenue Service issued final regulations regarding the deduction and capitalization of amounts paid to acquire, produce, improve, or dispose of tangible personal property. These regulations are generally effective for tax years beginning on or after January 1, 2014. The application of these regulations did not have a material impact on the Company's consolidated financial statements. Deferred Income Taxes - Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and for income tax purposes. Such amounts are classified in the consolidated statements of financial position as current or non-current assets or liabilities based upon the classification of the related assets and liabilities. The tax effects of significant temporary differences and carry-forwards that gave rise to year-end deferred federal and state tax balances, as presented in the consolidated statements of financial position, were as follows: December 31 ($ in millions) 2015 2014 Deferred Tax Assets Retirement benefits $ 571 $ 592 Workers' compensation 263 256 Reserves not currently deductible for tax purposes 21 9 Stock-based compensation 19 14 Net operating losses and tax credit carry-forwards 17 20 Other 12 9 Gross deferred tax assets 903 900 Less valuation allowance 11 14 Net deferred tax assets 892 886 Deferred Tax Liabilities Depreciation and amortization 310 297 Contract accounting differences 85 53 Purchased intangibles 161 195 Gross deferred tax liabilities 556 545 Total net deferred tax assets $ 336 $ 341 As of December 31, 2015 , the Company had gross state income tax credit carry-forwards of approximately $22 million , which expire from 2016 through 2018. A deferred tax asset of approximately $14 million (net of federal benefit) has been established related to these state income tax credit carry-forwards, with a valuation allowance of $9 million against such deferred tax asset as of December 31, 2015 . The Company had a gross state net operating loss carry-forward of $39 million , which expires in 2022. A deferred tax asset of approximately $2 million (net of federal benefit) has been established for the net operating loss carry-forward, with a full valuation allowance as of December 31, 2015. T he Company had a federal net operating loss carry-forward of $2 million from the UPI acquisition, which expires in 2034. In 2015, the Company elected to early adopt ASU 2015-17 retrospectively as of December 31, 2015, and therefore reclassified deferred tax assets totaling $129 million to long-term deferred tax assets as of December 31, 2014. See Note 3: Accounting Standards Updates.

Debt

Debt	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Debt	DEBT Long-term debt consisted of the following: December 31 ($ in millions) 2015 2014 Term loan due March 30, 2016 $ — $ 395 Senior notes due March 15, 2021, 7.125% — 600 Senior notes due December 15, 2021, 5.000% 600 600 Senior notes due November 15, 2025, 5.000% 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 Less unamortized debt issuance costs (32 ) (30 ) Total long-term debt 1,273 1,670 Less current portion — 108 Long-term debt, net of current portion $ 1,273 $ 1,562 Credit Facility - In March 2011, the Company entered into a Credit Facility with third-party lenders. On July 13, 2015, the Company entered into a Second Amended and Restated Credit Agreement (the “Amended Credit Facility”) with third-party lenders. The Amended Credit Facility includes a revolving credit facility of $1,250 million , which may be drawn upon during a period of five years from July 13, 2015. The revolving credit facility includes a letter of credit subfacility of $500 million . The revolving credit facility has 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, which may vary between 1.25% and 2.0% . The revolving credit facility also has a commitment fee rate on the unutilized balance based on the Company’s leverage ratio. The commitment fee rate as of December 31, 2015 was 0.25% and may vary between 0.25% and 0.35% . As of December 31, 2015 , $27 million in letters of credit were issued but undrawn, and the remaining $1,223 million of the revolving credit facility was unutilized. The Company had unamortized debt issuance costs associated with its credit facilities of $10 million as of each of December 31, 2015 and 2014. The Amended Credit Facility contains customary affirmative and negative covenants, as well as a financial covenant based on a maximum total leverage ratio. The terms of the Amended Credit Facility also limit the Company's ability to pay dividends. Each of the Company's existing and future material wholly owned domestic subsidiaries, except those that are specifically designated as unrestricted subsidiaries, are and will be guarantors under the Amended Credit Facility. Substantially all tangible and intangible material assets of the Company and domestic subsidiaries are pledged as collateral under the Amended Credit Facility. On July 13, 2015, the Company used cash on hand to repay all amounts outstanding under the prior credit facility, including $345 million in principal amount of outstanding term loans. Senior Notes - In March 2011, 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. In December 2014, the Company issued $600 million aggregate principal amount of unregistered 5.000% senior notes due December 15, 2021. The net proceeds from the issuance of these unregistered senior notes were used to repurchase the Company's 6.875% senior notes due March 15, 2018 in connection with the 2014 tender offer and redemption described below. In November 2015, the Company issued $600 million aggregate principal amount of unregistered 5.000% senior notes due November 15, 2025. The net proceeds from the issuance of these unregistered senior notes were used to repurchase the Company's 7.125% senior notes due March 15, 2021 in connection with the 2015 tender offer and redemption described below. Interest on the Company's senior notes is payable semi-annually. The terms of the 5.000% senior notes limit the Company’s ability and the ability of certain of its subsidiaries to create liens, enter into sale and leaseback transactions, sell assets, and effect consolidations or mergers. The Company had unamortized debt issuance costs associated with the senior notes of $22 million and $20 million as of December 31, 2015 and 2014, respectively. Tender Offers and Redemptions - During the fourth quarter of 2015, the Company completed a tender offer, followed by a redemption of untendered notes, to purchase for cash an aggregate principal amount of $600 million of its 7.125% senior notes due March 15, 2021. During the fourth quarter of 2014, the Company completed a tender offer, followed by a redemption of untendered notes, to purchase for cash an aggregate principal amount of $600 million of its 6.875% senior notes due March 15, 2018. Early Extinguishment of Debt - Details of the loss on early extinguishment of debt related to the Amended Credit Facility and refinancing of senior notes, which was included in interest expense, were as follows: December 31 ($ in millions) 2015 2014 Redemption and tender premiums and fees $ 33 $ 31 Write-off of unamortized debt issuance costs 11 6 Total loss on early extinguishment of debt $ 44 $ 37 Mississippi Economic Development Revenue Bonds - As of December 31, 2015 and 2014 , 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. While repayment of principal and interest is guaranteed by Northrop Grumman Systems Corporation, HII has agreed to indemnify Northrop Grumman Systems Corporation for any losses related to the guaranty. In accordance with the terms of the bonds, the proceeds were used to finance the construction, reconstruction, and renovation of the Company's interest in certain ship manufacturing and repair facilities, or portions thereof, located in the state of Mississippi. Gulf Opportunity Zone Industrial Development Revenue Bonds - As of December 31, 2015 and 2014 , the Company had $21 million outstanding under Gulf Opportunity Zone Industrial Development Revenue Bonds ("GO Zone IRBs") 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. In accordance with the terms of the bonds, the proceeds were used to finance the construction, reconstruction, and renovation of the Company's interest in certain ship manufacturing and repair facilities, or portions thereof, located in the state of Mississippi. The Company's debt arrangements contain customary affirmative and negative covenants, including a maximum leverage ratio. The Company was in compliance with all debt covenants during the year ended December 31, 2015 . The estimated fair values of the Company's total long-term debt, including current portions, as of December 31, 2015 and December 31, 2014 , were $1,343 million and $1,779 million , respectively. The fair values of the Company's long-term debt were 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. The Company does not have any principal payments due on long-term debt within the next five years.

Investigations, Claims, And Lit

Investigations, Claims, And Litigation	12 Months Ended
	Dec. 31, 2015
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. Any 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 will 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. In December 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. In February 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 filed a motion to dismiss the case and a motion to disqualify relator Holmes, and all other matters were stayed pending resolution of those motions. In June 2015, the District Court granted the Company’s motion to disqualify Holmes as relator, dismissed the case as to Holmes, and entered final judgment in favor of the Company. Holmes has appealed the District Court's decision to the U.S. Court of Appeals for the Fifth Circuit. 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, treble, or other damages. U.S. Government regulations provide that certain findings against a contractor may also lead to suspension or debarment from future U.S. Government contracts or the loss of export privileges. Any suspension or debarment would 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 Navy and 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 provided 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. The U.S. Navy has reduced its portion of the withhold from $18.2 million to $4.7 million , while expressing its view that the gross amount of potential mischarging incurred by the Navy will likely not exceed $3.1 million . The U.S. Coast Guard informed the Company in June 2014 that it was provisionally reducing its withhold from $5.8 million to $3.6 million . Based on the results of its internal investigation, the Company estimates that the maximum amount of U.S. Navy and Coast Guard mischarging is approximately $4 million . The Company is continuing discussions with its U.S. Government customers regarding the potential release of an additional portion of the withheld funds, but the Company cannot predict whether or when these customers will agree to any additional release of the withhold amounts. In June 2015, the DoJ informed the Company that it is investigating the matters disclosed by the Company to the DoD in January 2013. In July 2015, the DoJ requested information from the Company, and the Company is cooperating with the DoJ’s requests and has provided certain information to the DoJ. Depending upon the outcome of this matter, which could result in litigation by the DoJ against the Company, the Company could be subject to civil penalties, damages, and/or suspension or debarment from future U.S. Government contracts, which could have a material effect on its consolidated financial position, results of operations, or cash flows. Given the early stage of the Company’s discussions with the DoJ, the Company is currently unable to estimate an amount or range of reasonably possible loss or to express an opinion regarding the ultimate outcome of this matter. Asbestos Related Claims - HII and its predecessors-in-interest are defendants in a longstanding series of cases that have been and continue to be filed in various jurisdictions around the country, wherein former and current employees and various third parties 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. The average cost per case to resolve cases during the years ended December 31, 2015, 2014, and 2013 was immaterial individually and in the aggregate. The Company’s estimate of asbestos-related liabilities is subject to uncertainty because liabilities are influenced by numerous variables that are inherently difficult to predict. Key variables include the number and type of new claims, the litigation process from jurisdiction to jurisdiction and from case to case, reforms made by state and federal courts and the passage of state or federal tort reform legislation. Although the Company believes the ultimate resolution of current 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. Other Litigation - The Company and its predecessor-in-interest have been in litigation with the Bolivarian Republic of Venezuela (the “Republic”) since 2002 over a contract for the repair, refurbishment and modernization at Ingalls of two foreign-built frigates. The case proceeded towards arbitration, then appeared to settle favorably, but the settlement was overturned in court and the matter returned to litigation. In March 2014, the Company filed an arbitral statement of claim asserting breaches of the contract and $173 million in damages plus substantial interest and litigation expenses. In July 2014, the Republic filed in the arbitration a statement of defense denying all the Company’s allegations and a counterclaim alleging late redelivery of the frigates, unfinished work and breach of warranty and asserting damages of $61 million plus interest. An arbitration hearing was held in January 2015, and the Company cannot predict when the arbitration panel will render a decision. No assurances can be provided regarding the ultimate outcome of this matter. 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	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Contract Performance Contingencies - Contract profit margins may include estimates of revenues for matters on which the customer and the Company have not reached agreement, 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 December 31, 2015 , the recognized amounts related to claims and requests for equitable adjustment were 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. 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's obligations and, in such cases, generally obtains cross-indemnification from the other members of the arrangement. In the ordinary course of business, the Company may guarantee obligations of its subsidiaries under certain contracts. Generally, the Company is liable under such an arrangement only if its subsidiary is unable to perform under its contract. Historically, the Company has not incurred any substantial liabilities resulting from these guarantees. As of December 31, 2015 , the Company was not aware of any existing event of default that would require it 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 the related 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 December 31, 2015 , the probable future cost for environmental remediation was $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 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 December 31, 2015 , the Company had $27 million in standby letters of credit issued but undrawn, as indicated in Note 14: Debt, and $356 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. Collective Bargaining Agreements - Of the Company's 36,000 employees, approximately 50% are covered by a total of eight collective bargaining agreements. Newport News has three collective bargaining agreements covering represented employees, which expire in July 2017, August 2018, and December 2018. Newport News craft workers employed at the Kesselring Site near Saratoga Springs, New York are represented under an indefinite Department of Energy ("DoE") site agreement. Ingalls has five collective bargaining agreements covering represented employees, all of which expire in March 2018. Approximately 35 SN3 craft employees at the Hanford Site near Richland, Washington are represented under an indefinite DoE site stabilization agreement. Collective bargaining agreements generally expire after three to five years and are subject to renegotiation at that time. The Company does not expect the results of these negotiations, either individually or in the aggregate, to have a material effect on the Company's consolidated results of operations. Purchase Obligations - Periodically the Company enters into agreements to purchase goods or services that are enforceable and legally binding on the Company and specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum, or variable price provisions; and the approximate timing of the transaction. These obligations are primarily comprised of open purchase order commitments to vendors and subcontractors pertaining to funded contracts. Operating Leases - Rental expense for operating leases for the years ended December 31, 2015 , 2014 , and 2013 , was $62 million , $53 million , and $46 million , respectively. These amounts are net of immaterial amounts of sublease rental income. Minimum rental commitments under long-term non-cancellable operating leases for each of the years 2016 through 2020 and thereafter are: ($ in millions) 2016 $ 35 2017 30 2018 27 2019 23 2020 19 Thereafter 63 Total $ 197

Impacts From Hurricanes

Impacts From Hurricanes	12 Months Ended
	Dec. 31, 2015
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 an 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 2013, the Company resolved litigation against its remaining insurer, Factory Mutual Insurance Company ("FM Global"), arising out of a disagreement concerning the coverage of certain losses related to Hurricane Katrina. Under the settlement agreement with FM Global, in the third quarter of 2013 FM Global made a cash payment of $180 million to the Company and the Company released its claim against FM Global, resulting in a total recovery from the Company's insurers of $677.5 million for its Hurricane Katrina claim. The $180 million was recorded as an insurance recovery gain in operating income in the third quarter of 2013. 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. Impacted by this decision, the Company’s accounting for hurricane insurance related matters resulted in a reduction in operating income of $116 million . The 2013 financial results reflect disallowances as indicated in the COFD. For the year ended December 31, 2013, the Company’s accounting for hurricane related matters, including the insurance recovery gain of $180 million and the $116 million reduction in operating income related to its contracts with the U.S. Government, resulted in a net favorable impact to operating income of $64 million . In October 2014, the Company executed a Memorandum of Understanding ("MOU") with the U.S. Navy and U.S. Coast Guard acknowledging the requirements set forth in the COFD. The MOU did not have a material impact on the Company's accounting for hurricane related matters. 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 included damages unrecovered from FM Global plus costs, legal fees, and expenses incurred in the lawsuit against FM Global, as well as interest. In January 2014, the Company amended its complaint to allege fraud and seek punitive damages. On May 29, 2015, the Company and Aon entered into a settlement agreement, pursuant to which Aon made a cash payment of $150 million to the Company and the Company released its claims against Aon. The $150 million settlement was recorded as a gain in operating income in the second quarter of 2015. Based on the previously executed MOU and COFD, the Company has recorded a credit to the U.S. Government, which resulted in a reduction in operating income of $14 million in the second quarter of 2015. Should the U.S. Government disagree with the Company’s allocation of proceeds, the Company may be required to allocate additional amounts to the U.S. Government. The $150 million gain and allowable cost credit resulted in a net favorable impact to operating income for the year ended December 31, 2015 , of $136 million .

Employee Pension and Other Post

Employee Pension and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Pension and Other Postretirement Benefits	EMPLOYEE PENSION AND OTHER POSTRETIREMENT BENEFITS The Company provides defined benefit pension plans and postretirement benefit plans to eligible employees. Non-collectively bargained defined benefit pension benefits accruing under the traditional years of service and compensation formula were amended in 2009 to freeze future service accruals and have been replaced with a cash balance benefit for all current non-collectively bargained employees. Except for major collectively bargained plans, the Company's qualified defined benefit pension plans are frozen to new entrants. The Company's policy is to fund its qualified defined benefit pension plans at least to the minimum amounts required under U.S. Government regulations. Plan obligations are measured based on the present value of projected future benefit payments to participants for services rendered to date. The measurement of projected future benefits is dependent on the terms of each individual plan, demographics, and valuation assumptions. No assumption is made regarding any potential changes to the benefit provisions beyond those to which the Company is currently committed, for example under existing collective bargaining agreements. The Company also sponsors 401(k) defined contribution pension plans in which most employees, including certain hourly employees, are eligible to participate. Company contributions for most defined contribution pension plans are based on the matching of employee contributions up to 4% of eligible compensation. Certain hourly employees are covered under a target benefit plan. In addition to the 401(k) defined contribution pension benefit formula, non-collectively bargained employees hired after June 30, 2008, are eligible to participate in a defined contribution benefit program in lieu of a defined benefit pension plan. The Company's contributions to the qualified defined contribution pension plans for the years ended December 31, 2015 , 2014 , and 2013 , were $73 million , $70 million , and $61 million , respectively. The Company also sponsors defined benefit and defined contribution pension plans to provide benefits in excess of the qualified limits. The liabilities related to these plans as of December 31, 2015, were $146 million and $27 million , respectively, and as of December 31, 2014, were $142 million and $26 million , respectively. Assets, primarily in the form of Level 1 marketable securities, held in grantor trusts, are intended to fund certain of these obligations. The trusts’ fair values supporting these liabilities as of December 31, 2015 and 2014, were $74 million and $45 million , respectively, of which $47 million and $43 million , respectively, were related to the non-qualified defined benefit pension plans. The Company provides contributory postretirement health care and life insurance benefits to a dominantly closed group of eligible employees, retirees, and their qualifying dependents. Covered employees achieve eligibility to participate in these contributory plans upon retirement from active service if they meet specified age, years of service, and grandfathered requirements. Benefits are not guaranteed, and the Company reserves the right to amend or terminate coverage at any time. The Company's contributions for retiree health care benefits are subject to caps, which limit Company contributions when spending thresholds are reached. The measurement date for all of the Company's retirement related plans is December 31. The costs of the Company's defined benefit pension plans and other postretirement plans for the years ended December 31, 2015 , 2014 and 2013 , were as follows: Pension Benefits Other Benefits Year Ended December 31 Year Ended December 31 ($ in millions) 2015 2014 2013 2015 2014 2013 Components of Net Periodic Benefit Cost Service cost $ 150 $ 136 $ 147 $ 13 $ 13 $ 21 Interest cost 242 253 215 27 30 33 Expected return on plan assets (351 ) (322 ) (289 ) — — — Amortization of prior service cost (credit) 19 19 18 (20 ) (26 ) (21 ) Amortization of net actuarial loss (gain) 86 52 118 2 — 16 Curtailments — — (1 ) — — — Net periodic benefit cost $ 146 $ 138 $ 208 $ 22 $ 17 $ 49 The funded status of the Company's plans as of December 31, 2015 and 2014 , was as follows: Pension Benefits Other Benefits December 31 December 31 ($ in millions) 2015 2014 2015 2014 Change in Benefit Obligation Benefit obligation at beginning of year $ 5,671 $ 4,730 $ 650 $ 616 Service cost 150 136 13 13 Interest cost 242 253 27 30 Plan participants' contributions 11 26 6 7 Actuarial loss (gain) (254 ) 714 (91 ) 24 Benefits paid (185 ) (168 ) (39 ) (40 ) Curtailments — (20 ) — — Benefit obligation at end of year 5,635 5,671 566 650 Change in Plan Assets Fair value of plan assets at beginning of year 4,731 4,310 — — Actual return on plan assets (47 ) 437 — — Employer contributions 103 126 33 33 Plan participants' contributions 11 26 6 7 Benefits paid (185 ) (168 ) (39 ) (40 ) Fair value of plan assets at end of year 4,613 4,731 — — Funded status $ (1,022 ) $ (940 ) $ (566 ) $ (650 ) Amounts Recognized in the Consolidated Statements of Financial Position: Pension plan assets $ — $ 17 $ — $ — Current liability (1) (21 ) (18 ) (143 ) (143 ) Non-current liability (2) (1,001 ) (939 ) (423 ) (507 ) Accumulated other comprehensive loss (income) (pre-tax) related to: Prior service costs (credits) 86 105 (105 ) (125 ) Net actuarial loss (gain) 1,433 1,374 (21 ) 73 (1) Included in other current liabilities and current portion of postretirement plan liabilities, respectively. (2) Included in pension plan liabilities and other postretirement plan liabilities, respectively. The Projected Benefit Obligation ("PBO"), Accumulated Benefit Obligation ("ABO"), and asset values for the Company's qualified pension plans were $5,490 million , $5,146 million , and $4,613 million , respectively, as of December 31, 2015 , and $5,529 million , $5,124 million , and $4,731 million , respectively, as of December 31, 2014 . The PBO represents the present value of pension benefits earned through the end of the year, with allowance for future salary increases. The ABO is similar to the PBO, but does not provide for future salary increases. The PBO and fair value of plan assets for all qualified and non-qualified pension plans with PBOs in excess of plan assets were $5,635 million and $4,613 million , respectively, as of December 31, 2015 , and $4,394 million and $3,438 million , respectively, as of December 31, 2014 . The ABO and fair value of plan assets for all qualified and non-qualified pension plans with ABOs in excess of plan assets were $4,051 million and $3,391 million , respectively, as of December 31, 2015 , and $3,981 million and $3,438 million , respectively, as of December 31, 2014 . The ABO for all pension plans was $5,273 million and $5,244 million as of December 31, 2015 and 2014 , respectively. The changes in amounts recorded in accumulated other comprehensive income (loss) were as follows: Pension Benefits Other Benefits Year Ended December 31 Year Ended December 31 ($ in millions) 2015 2014 2013 2015 2014 2013 Prior service cost (credit) $ — $ — $ (66 ) $ — $ — $ 145 Amortization of prior service cost (credit) 19 19 18 (20 ) (26 ) (21 ) Net actuarial loss (gain) (144 ) (599 ) 716 91 (24 ) 220 Amortization of net actuarial loss (gain) 86 52 118 2 — 16 Other (1 ) 20 12 1 — 1 Total changes in accumulated other comprehensive income (loss) $ (40 ) $ (508 ) $ 798 $ 74 $ (50 ) $ 361 The amounts included in accumulated other comprehensive income (loss) as of December 31, 2015 , expected to be recognized as components of net periodic expense in 2016 were as follows: ($ in millions) Pension Benefits Other Benefits Prior service cost (credit) $ 18 $ (19 ) Net loss 84 (5 ) Total $ 102 $ (24 ) The weighted average assumptions used to determine the net periodic benefit costs for each year ended December 31 were as follows: Pension Benefits ($ in millions) 2015 2014 2013 Discount rate 4.34 % 5.27 % 4.27 % Expected long-term rate on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 3.64 % 3.69 % 3.66 % Other Benefits ($ in millions) 2015 2014 2013 Discount rate 4.22 % 5.03 % 4.02 % Initial health care cost trend rate assumed for next year 7.00 % 7.33 % 7.67 % Gradually declining to a rate of 5.00 % 5.00 % 5.00 % Year in which the rate reaches the ultimate rate 2023 2022 2021 The weighted average assumptions used to determine the benefit obligations as of December 31 of each year were as follows: Pension Benefits Other Benefits December 31 December 31 ($ in millions) 2015 2014 2015 2014 Discount rate 4.73 % 4.34 % 4.58 % 4.22 % Rate of compensation increase 3.66 % 3.64 % Initial health care cost trend rate assumed for next year 7.00 % 7.00 % Gradually declining to a rate of 5.00 % 5.00 % Year in which the rate reaches the ultimate rate 2024 2023 Health Care Cost Trend Rate - The health care cost trend rate represents the annual rates of change in the cost of health care benefits based on estimates of health care inflation, changes in health care utilization or delivery patterns, technological advances, government mandated benefits, and other considerations. Using a combination of market expectations and economic projections on December 31, 2015 , the Company selected an expected initial health care cost trend rate of 7.00% and an ultimate health care cost trend rate of 5.00% to be reached in 2024 . On December 31, 2014 , the Company assumed an expected initial health care cost trend rate of 7.00% and an ultimate health care cost trend rate of 5.00% to be reached in 2023 . A one percent change in the assumed health care cost trend rates would have the following effects on 2015 results: 1 Percentage Point ($ in millions) Increase Decrease Effect on postretirement benefit expense $ 2 $ (2 ) Effect on postretirement benefit obligations 22 (20 ) The Employee Retirement Income Security Act of 1974 ("ERISA"), including amendments under pension relief, defines the minimum amount that must be contributed to the Company's qualified defined benefit pension plans. In determining whether to make discretionary contributions to these plans above the minimum required amounts, the Company considers various factors, including attainment of the funded percentage needed to avoid benefit restrictions and other adverse consequences, minimum CAS funding requirements, and the current and anticipated future funding levels of each plan. The Company's contributions to its qualified defined benefit pension plans are affected by a number of factors, including published IRS interest rates, the actual return on plan assets, actuarial assumptions, and demographic experience. These factors and the Company's resulting contributions also impact the plans' funded status. If the IRS publishes updated mortality tables for funding purposes, the Company’s pension contributions could be affected. The Company made the following contributions to its pension and other postretirement plans for the years ended December 31, 2015 , 2014 , and 2013 : Year Ended December 31 ($ in millions) 2015 2014 2013 Pension plans Discretionary Qualified $ 99 $ 123 $ 301 Non-qualified 4 3 4 Other benefit plans 33 33 38 Total contributions $ 136 $ 159 $ 343 For the year ending December 31, 2016 , the Company expects its cash contributions to its qualified defined benefit pension plans to be $167 million , all of which will be discretionary. For the year ending December 31, 2016 , the Company expects its cash contributions to its postretirement benefit plans to be approximately $37 million . 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 plans 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 plans decreased the postretirement liability and pre-tax accumulated other comprehensive loss by approximately $177 million . The following table presents estimated future benefit payments, using the same assumptions used in determining the Company's benefit obligations as of December 31, 2015 . Benefit payments depend on future employment and compensation levels, years of service, and mortality. Changes in any of these factors could significantly affect these estimated amounts. Other Benefits ($ in millions) Pension Benefits Benefit Payments Subsidy Receipts 2016 $ 204 $ 37 $ — 2017 217 38 — 2018 231 40 — 2019 246 41 — 2020 263 42 — Years 2021 to 2025 $ 1,617 $ 214 $ 2 Pension Plan Assets Pension assets include public equities, government and corporate bonds, cash and cash equivalents, private real estate funds, hedge funds, and other assets. Plan assets are held in a master trust and overseen by the Company's Investment Committee. All assets are externally managed through a combination of active and passive strategies. Managers may only invest in the asset classes for which they have been appointed. The Investment Committee is responsible for setting the policy that provides the framework for management of the plan assets. The Investment Committee has set the minimum and maximum permitted values for each asset class in the Company's pension plan master trust for the year ended December 31, 2015 , as follows: Range U.S. equities 20 - 42% International equities 15 - 33% Fixed income securities 25 - 50% Alternative investments 5 - 15% The general objectives of the Company's pension asset strategy are to earn a rate of return over time to satisfy the benefit obligations of the plans, meet minimum ERISA funding requirements, and maintain sufficient liquidity to pay benefits and address other cash requirements within the master trust. Specific investment objectives include reducing the volatility of pension assets relative to benefit obligations, achieving a competitive, total investment return, achieving diversification between and within asset classes, and managing other risks. Investment objectives for each asset class are determined based on specific risks and investment opportunities identified. Decisions regarding investment policies and asset allocation are made with the understanding of the historical and prospective return and risk characteristics of various asset classes, the effect of asset allocations on funded status, future Company contributions, and projected expenditures, including benefits. The Company updates its asset allocations periodically. The Company uses various analytics to determine the optimal asset mix and considers plan obligation characteristics, duration, liquidity characteristics, funding requirements, expected rates of return, regular rebalancing, and the distribution of returns. Actual allocations to each asset class could vary from target allocations due to periodic investment strategy changes, short-term market value fluctuations, the length of time it takes to fully implement investment allocation positions, such as real estate and other alternative investments, and the timing of benefit payments and Company contributions. Taking into account the asset allocation ranges, the investment fiduciary determines the specific allocation of the master trust's investments within various asset classes. The master trust utilizes select investment strategies, which are executed through separate account or fund structures with external investment managers who demonstrate experience and expertise in the appropriate asset classes and styles. The selection of investment managers is done with careful evaluation of all aspects of performance and risk, demonstrated fiduciary responsibility, investment management experience, and a review of the investment managers' policies and processes. Investment performance is monitored frequently against appropriate benchmarks and tracked to compliance guidelines with the assistance of third party consultants and performance evaluation tools and metrics. Plan assets are stated at fair value. The Company employs a variety of pricing sources to estimate the fair value of its pension plan assets, including independent pricing vendors, dealer or counterparty-supplied valuations, third-party appraisals, and appraisals prepared by the Company's investment managers or other experts. Investments in equity securities, common and preferred, are valued at the last reported sales price when an active market exists. Securities for which official or last trade pricing on an active exchange is available are classified as Level 1. If closing prices are not available, securities are valued at the last trade price, if deemed reasonable, or a broker's quote in a non-active market, and are typically categorized as Level 2. Investments in fixed-income securities are generally valued by independent pricing services or dealers who make markets in such securities. Pricing methods are based upon market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, and fixed-income securities typically are categorized as Level 2. Investments in collective trust funds and commingled funds based on the use of Net Asset Values (“NAV”) are valued based on the redemption price of units owned by the master trust, which is based on the current fair values of the funds’ underlying assets, as reported by the investment manager. The underlying assets are valued based on observable inputs. Accordingly, collective trust and commingled funds are categorized as Level 2. Investments in hedge funds generally do not have readily available market quotations and are estimated at fair value, which primarily utilizes NAV or the equivalent, as a practical expedient, as reported by the investment manager. Hedge funds usually have restrictions on redemptions that might affect the ability to sell the investment at NAV in the short term. Accordingly, these investments are typically classified as Level 3. Real estate funds are typically valued through updated independent third-party appraisals, which are adjusted for changes in cash flows, market conditions, property performance, and leasing status. Since real estate funds do not have readily available market quotations, they are generally valued at NAV or its equivalent, as a practical expedient, as reported by the asset manager. Redemptions from real estate funds are also subject to various restrictions. Accordingly, these investments are classified as Level 3. Management reviews independently appraised values, audited financial statements, and additional pricing information to evaluate the net asset values. For the very limited group of investments for which market quotations are not readily available or for which the above valuation procedures are deemed not to reflect fair value, additional information is obtained from the investment manager and evaluated internally to determine whether any adjustments are required to reflect fair value. The Company might be unable to quickly liquidate some assets at amounts close or equal to fair value in order to meet the plans' liquidity requirements or respond to specific events, such as the creditworthiness of any particular issuer or counterparty. Illiquid assets are generally long-term investments that complement the long-term nature of the Company's pension obligations and are generally not used to fund benefit payments in the short term. Management monitors liquidity risk on an ongoing basis and has procedures designed to maintain flexibility in troubled markets. The master trust has considerable investments in fixed income securities for which changes in the relevant interest rate of a particular instrument might result in the inability to secure similar returns upon the maturity or sale. Changes in prevailing interest rates might result in an increase or decrease in fair value of the instrument. Investment managers are permitted to use interest rate swaps and other financial derivatives to manage interest rate risk. Counterparty risk is the risk that a counterparty to a financial instrument held by the master trust will default on its commitment. Counterparty risk is generally related to over-the-counter derivative instruments used to manage risk exposure to interest rates on long-term debt securities. Certain agreements with counterparties employ set-off agreements, collateral support arrangements, and other risk mitigation practices designed to reduce the net credit risk exposure in the event of a counterparty default. Credit policies and processes are in place to manage concentrations of risk by seeking to undertake transactions with large well-capitalized counterparties and by monitoring the creditworthiness of these counterparties. The fair values of the Company's retirement plan assets by asset category and by valuation hierarchy level as described in Note 2: Summary of Significant Accounting Policies were as follows: December 31, 2015 ($ in millions) Total Level 1 Level 2 Level 3 Asset Category Equity U.S. equities (1) $ 1,392 $ 460 $ 932 $ — International equities (1) 1,074 597 477 — Fixed Income U.S. government 175 — 175 — U.S. agency 171 — 171 — Non-U.S. government 70 — 70 — Investment grade (2) 1,008 — 1,008 — Asset backed 39 — 39 — Non-investment grade (3) 40 — 40 — Cash and cash equivalents (4) 45 5 40 — Hedge funds 312 — — 312 Real estate fund 285 — — 285 Other 2 — 2 — Total assets at fair value $ 4,613 $ 1,062 $ 2,954 $ 597 (1) U.S. and international equity securities include investments in small, medium, and large capitalization stocks of public companies held in separately managed accounts or commingled trust funds. (2) Investment grade fixed income securities include corporate bonds rated Baa3/BBB- or higher by one or more rating agencies. (3) Non-investment grade fixed income securities include corporate bonds consistently rated below Baa3/BBB- by one or more rating agencies and units of a high yield commingled fund. (4) Cash and cash equivalents are highly liquid short-term investment funds and include net receivables and payables of the trust. These funds are available for immediate use to fund daily operations, execute investment policies, and serve as a temporary investment vehicle. The Company's plan asset allocation policy does not include cash. December 31, 2014 ($ in millions) Total Level 1 Level 2 Level 3 Asset Category Equity U.S. equities (1) $ 1,423 $ 467 $ 956 $ — International equities (1) 1,082 599 483 — Fixed Income U.S. government 237 — 237 — U.S. agency 174 — 174 — Non-U.S. government 88 — 88 — Investment grade (2) 1,041 — 1,041 — Asset backed 52 — 52 — Non-investment grade (3) 45 — 45 — Cash and cash equivalents (4) 42 5 37 — Hedge funds 298 — — 298 Real estate fund 247 — — 247 Other 2 — 2 — Total assets at fair value $ 4,731 $ 1,071 $ 3,115 $ 545 (1) U.S. and international equity securities include investments in small, medium, and large capitalization stocks of public companies held in separately managed accounts or commingled trust funds. (2) Investment grade fixed income securities include corporate bonds rated Baa3/BBB- or higher by one or more rating agencies. (3) Non-investment grade fixed income securities include corporate bonds consistently rated below Baa3/BBB- by one or more rating agencies and units of a high yield commingled fund. (4) Cash and cash equivalents are highly liquid short-term investment funds and include net receivables and payables of the trust. These funds are available for immediate use to fund daily operations, execute investment policies, and serve as a temporary investment vehicle. The Company's plan asset allocation policy does not include cash. The master trust limits the use of derivatives through direct or separate account investments, such that the derivatives used are liquid and able to be readily valued in the market. Derivative usage in separate account structures is limited to hedging purposes or to gain market exposure in a non-speculative manner. The net fair market value of the master trust's derivatives through direct or separate account investments was less than $1 million as of December 31, 2015 and 2014 . The following tables summarize the changes in Level 3 retirement plan assets measured at fair value for the years ended December 31, 2015 and 2014 . Return on plan assets Attributable to Assets Held at December 31, 2015 Fair Value at December 31, 2014 Attributable to Assets Sold Transfers Fair Value at December 31, 2015 Into (Out) of ($ in millions) Purchases Sales Level 3 Level 3 Asset Category: Hedge funds $ 298 $ 14 $ — $ — $ — $ — $ — $ 312 Real estate fund 247 38 — — — — — 285 Total Level 3 fair value $ 545 $ 52 $ — $ — $ — $ — $ — $ 597 Return on plan assets Attributable to Assets Held at December 31, 2014 Fair Value at December 31, 2013 Attributable to Assets Sold Transfers Fair Value at December 31, 2014 Into (Out) of ($ in millions) Purchases Sales Level 3 Level 3 Asset Category: Hedge funds $ 257 $ 19 $ — $ 22 $ — $ — $ — $ 298 Real estate fund 188 24 — 35 — — — 247 Total Level 3 fair value $ 445 $ 43 $ — $ 57 $ — $ — $ — $ 545

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation Plans	STOCK COMPENSATION PLANS As of December 31, 2015 , HII had stock-based compensation awards outstanding under the following plans: the Huntington Ingalls Industries, Inc. 2011 Long-Term Incentive Stock Plan (the "2011 Plan") and the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan (the "2012 Plan"). Stock Compensation Plans On March 23, 2012, the Company's board of directors adopted the 2012 Plan, subject to stockholder approval, and the Company's stockholders approved the 2012 Plan on May 2, 2012. Award grants made on or after May 2, 2012, were made under the 2012 Plan. Award grants made prior to May 2, 2012, were made under the 2011 Plan. No future grants will be made under the 2011 Plan. The 2012 Plan permits awards of stock options, stock appreciation rights, and other stock awards. Each stock option grant is made with an exercise price of not less than 100% of the closing price of HII's common stock on the date of grant. Stock awards, in the form of RPSRs, RSRs, and stock rights, are granted to key employees and members of the board of directors without payment to the Company. The 2012 Plan authorized (i) 3.4 million new shares; plus (ii) any shares subject to outstanding awards under the 2011 Plan that were subsequently forfeited to the Company; plus (iii) any shares subject to outstanding awards under the 2011 Plan that were subsequently exchanged by the participant as full or partial payment to the Company in connection with any such award or exchanged by a participant or withheld by the Company to satisfy the tax withholding obligations related to any such award. As of December 31, 2015 , the remaining aggregate number of shares of the Company's common stock authorized for issuance under the 2012 Plan was 4.3 million . The 2011 Plan permitted the awards of stock options and other stock awards. Each stock option grant was made with an exercise price of not less than 100% of the closing price of HII's common stock on the date of grant, with the exception of stock options issued at the time of the spin-off in exchange for Northrop Grumman stock options. Stock awards, in the form of stock rights, were granted to members of the board of directors without payment to the Company. Stock Awards Stock awards include RPSRs, RSRs, and stock rights. The fair value of stock awards is determined based on the closing market price of the Company's common stock on the grant date. Compensation expense for stock awards is measured based on the grant date fair value and recognized over the vesting period, generally three years . For purposes of measuring compensation expense, the amount of shares ultimately expected to vest is estimated at each reporting date based on management's expectations regarding the relevant service or performance criteria. The Company issued the following stock awards in the years ended December 31, 2015 , 2014 , and 2013 : Restricted Performance Stock Rights - For the year ended December 31, 2015 , the Company granted approximately 0.2 million RPSRs at a weighted average share price of $142.02 . These rights are subject to cliff vesting on December 31, 2017. For the year ended December 31, 2014 , the Company granted approximately 0.2 million RPSRs at a weighted average share price of $98.22 . These rights are subject to cliff vesting on December 31, 2016. For the year ended December 31, 2013 , the Company granted approximately 0.4 million RPSRs at a weighted average share price of $44.67 . These rights were fully vested as of December 31, 2015. All of the RPSRs are subject to the achievement of performance-based targets at the end of the respective vesting periods. Based upon the Company's results measured against such targets, between 0% and 200% of the original stated grant are expected to ultimately vest. Restricted Stock Rights - Retention stock awards are granted to key employees to ensure business continuity. In 2015, the Company granted approximately 3,000 RSRs at a weighted average share price of $115.50 , with cliff vesting one year from the grant date. In 2014, the Company granted approximately 12,000 RSRs at a weighted average share price of $101.21 , with cliff vesting three years from the grant date. As of December 31, 2015 , approximately 10,000 of these RSRs were outstanding. In connection with the spin-off, retention stock awards were granted to key employees to ensure a successful transition and business continuity. On March 31, 2011, the Company granted 0.7 million RSRs at a share price of $41.50 , with cliff vesting three years from the grant date. As of December 31, 2013, 0.6 million of these RSRs were outstanding, and they were settled on April 3, 2014. For the year ended December 31, 2015 , 0.9 million stock awards vested, of which approximately 0.4 million were transferred to the Company from employees in satisfaction of minimum tax withholding obligations. For the year ended December 31, 2014 , 1.5 million stock awards vested, of which approximately 0.6 million were transferred to the Company from employees in satisfaction of minimum tax withholding obligations. For the year ended December 31, 2013 , 0.9 million stock awards vested, of which approximately 0.3 million were transferred to the Company from employees in satisfaction of minimum tax withholding obligations. Stock Rights - The Company granted stock rights to its non-employee directors on a quarterly basis in 2015 , with each grant less than 10,000 shares. All stock rights granted to non-employee directors are fully vested on the grant date. If a non-employee director has met certain ownership guidelines, the non-employee director may elect under the terms of the Directors’ Compensation Policy and Board Deferred Compensation Policy to receive their annual equity award for the following calendar year in the form of either shares of the Company’s common stock or stock units that are payable in the fifth calendar year after the year in which the annual equity award is earned, or, if earlier, upon termination of the director’s board service. The stock award activity for the years ended December 31, 2015 , 2014 , and 2013 , was as follows: Stock Awards (in thousands) Weighted-Average Grant Date Fair Value Weighted Average Remaining Contractual Term Outstanding as of December 31, 2012 1,901 $ 39.92 1.4 years Granted 456 46.51 Adjustment due to performance 315 41.41 Vested (931 ) 41.41 Forfeited (68 ) 40.23 Outstanding as of December 31, 2013 1,673 40.92 1.0 year Granted 246 98.33 Adjustment due to performance 918 41.45 Vested (1,510 ) 41.45 Forfeited (16 ) 45.19 Outstanding as of December 31, 2014 1,311 51.23 0.7 years Granted 163 140.48 Adjustment due to performance 315 36.36 Vested (865 ) 36.36 Forfeited (33 ) 83.44 Outstanding as of December 31, 2015 891 $ 75.73 0.6 years Vested awards include stock awards that fully vested during the year based on the level of achievement of the relevant performance goals. The performance goals for outstanding RPSRs granted in 2015, 2014, and 2013 are based on two metrics as defined in the grant agreements: earnings before interest, taxes, depreciation, amortization, and pension, weighted at 50% , and pension-adjusted return on invested capital, weighted at 50% . Stock Options Effect of the Spin-Off - Prior to the spin-off, HII's current and former employees received stock options under Northrop Grumman's stock-based award plans (the "Northrop Grumman Plan"). As of the date of the spin-off, the stock options under the Northrop Grumman Plan were converted to stock options under the 2011 Plan. The conversion was effected so that the outstanding stock options held by the Company's current and former employees on the distribution date were adjusted to reflect the value of the distribution, such that the intrinsic value of the stock options was not diluted at the time of, and due to, the separation. This was achieved using the conversion rate included in the spin-off agreement. Unless otherwise stated, share amounts and share prices detailed below were retroactively adjusted to reflect the impact of the conversion. The Company measured the fair value of the stock options immediately before and after the conversion, and there was no incremental compensation expense associated with the conversion. The following is a description of the Northrop Grumman Plan stock options, which were converted into stock options under the 2011 Plan. Converted Stock Options - As of the date of the spin-off, outstanding stock options held by HII's current and former employees under the Northrop Grumman Plan were converted to stock options of HII under the 2011 Plan. Based on the conversion factor of 1.65 , included in the spin-off agreement, approximately 1.0 million stock options under the Northrop Grumman Plan were converted into approximately 1.6 million stock options under the 2011 Plan, approximately 1.4 million of which were fully vested at the time of conversion. Outstanding stock options granted prior to 2008 generally vested in 25% increments over four years from the grant date and expire ten years after the grant date. Stock options granted in 2008 and later vested in 33% increments over three years from the grant date and expire seven years after the grant date. The cumulative intrinsic value of the stock options at conversion was maintained in the conversion, and totaled $15 million at March 31, 2011. Compensation expense for the outstanding converted stock options was determined at the time of grant by Northrop Grumman. No stock options were granted during the years ended December 31, 2015 , 2014 , and 2013 . The fair value of the stock options was expensed on a straight-line basis over the vesting period of the options. The fair value of each of the stock options was estimated on the date of grant using a Black-Scholes option pricing model. The stock option activity for the years ended December 31, 2015 , 2014 , and 2013 , was as follows: Shares Under Option (in thousands) Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value ($ in millions) Outstanding as of December 31, 2012 1,166 $ 34.67 2.6 years $ 12 Exercised (346 ) 29.66 Canceled and Forfeited (1 ) 28.51 Outstanding as of December 31, 2013 819 35.01 2.1 years 45 Exercised (174 ) 31.11 Canceled and Forfeited (1 ) 31.76 Outstanding as of December 31, 2014 644 36.06 1.4 years 49 Exercised (111 ) 46.46 Outstanding as of December 31, 2015 533 $ 33.90 0.6 years $ 50 Vested as of December 31, 2015 533 $ 33.90 0.6 years $ 50 The intrinsic value of stock options exercised during the years ended December 31, 2015 , 2014 , and 2013 , was $11 million , $12 million , and $11 million , respectively. Intrinsic value is measured using the fair market value at the date of exercise for stock options exercised or at period end for outstanding stock options, less the applicable exercise price. The Company issued new shares to satisfy exercised stock options. Compensation Expense The Company recorded $43 million , $34 million , and $44 million of expense related to stock awards for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company recorded $17 million , $13 million , and $17 million as a tax benefit related to stock awards and stock options for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company recognized tax benefits for the years ended December 31, 2015 , 2014 , and 2013 , of $41 million , $53 million , and $32 million , respectively, from the issuance of stock in settlement of stock awards, and $4 million , $5 million , and $4 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively, from the exercise of stock options. Unrecognized Compensation Expense As of December 31, 2015 , the Company had less than $1 million of unrecognized compensation expense associated with RSRs granted in 2015 and 2014, which will be recognized over a weighted average period of 1.0 year , and $25 million of unrecognized expense associated with RPSRs granted in 2015 , 2014 , and 2013 , which will be recognized over a weighted average period of 0.6 years . As of December 31, 2015 , the Company had no unrecognized compensation expense related to stock options. Compensation expense for stock options was fully recognized as of December 31, 2013.

Unaudited Selected Quarterly Da

Unaudited Selected Quarterly Data	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Unaudited Selected Quarterly Data	UNAUDITED SELECTED QUARTERLY DATA Unaudited quarterly financial results for the years ended December 31, 2015 and 2014 , are set forth in the following tables: Year Ended December 31, 2015 ($ in millions, except per share amounts) 1st Qtr 2nd Qtr (1) 3rd Qtr 4th Qtr (2) Sales and service revenues $ 1,570 $ 1,745 $ 1,800 $ 1,905 Operating income (loss) 156 269 200 144 Earnings (loss) before income taxes 133 244 175 80 Net earnings (loss) 87 156 111 50 Dividends declared per share $ 0.40 $ 0.40 $ 0.40 $ 0.50 Basic earnings (loss) per share $ 1.80 $ 3.22 $ 2.31 $ 1.07 Diluted earnings (loss) per share $ 1.79 $ 3.20 $ 2.29 $ 1.06 (1) In the second quarter of 2015, the Company recorded a $59 million goodwill impairment charge. During the same period, the Company recorded $136 million of operating income as a result of the Aon settlement. (2) In the fourth quarter of 2015, the Company recorded $16 million goodwill impairment and $27 million intangible asset impairment charges. Year Ended December 31, 2014 ($ in millions, except per share amounts) 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr (3) Sales and service revenues $ 1,594 $ 1,719 $ 1,717 $ 1,927 Operating income (loss) 159 181 171 144 Earnings (loss) before income taxes 132 152 144 79 Net earnings (loss) 90 100 96 52 Dividends declared per share $ 0.20 $ 0.20 $ 0.20 $ 0.40 Basic earnings (loss) per share $ 1.83 $ 2.05 $ 1.97 $ 1.07 Diluted earnings (loss) per share $ 1.81 $ 2.04 $ 1.96 $ 1.05 (3) In the fourth quarter of 2014, the Company recorded a $47 million goodwill impairment charge.

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation - The 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-K 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.
Accounting Estimates	Accounting Estimates - The preparation of the Company's 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.
Revenue Recognition	Revenue Recognition - The majority of the Company's business is derived from long-term contracts for the construction of naval vessels, production of goods, and provision of services to the federal government, principally the U.S. Navy. In accounting for these contracts, the Company extensively utilizes the cost-to-cost measure of the percentage-of-completion method of accounting, principally based upon total costs incurred. Under this method, sales, including estimated earned fees or profits, are recorded as costs are incurred, generally based on the percentage that total costs incurred bear to total estimated costs at completion. For certain contracts that provide for deliveries of a substantial number of similar units, sales are accounted for using units of delivery as the basis to measure progress toward completion. Certain contracts contain provisions for price redetermination or for cost and/or performance incentives. Such redetermined amounts or incentives are included in sales when the amounts can reasonably be determined and estimated. Amounts representing contract change orders, claims, requests for equitable adjustment, or limitations in funding are included in sales only when they can be reliably estimated and realization is probable. The Company is accounting for one of its contracts under the percentage-of-completion method based on a zero profit margin and will continue such accounting until results can be estimated more precisely. Revenues related to this contract represent less than 1% of the Company's total revenues for 2015 . The Company estimates profit as the difference between total estimated revenues and total estimated cost of a contract and recognizes that profit over the life of the contract based on progress toward completion. If the Company estimates a contract will result in a loss, the full amount of the estimated loss is recognized against income in the period in which the loss is identified. The Company classifies contract revenues as product sales or service revenues depending upon the predominant attributes of the relevant underlying contracts. 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. Accordingly, 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 years ended December 31, 2015 , 2014 , and 2013 , net cumulative catch-up adjustments increased operating income by $239 million , $222 million and $113 million , respectively, and increased diluted earnings per share by $3.21 , $2.93 and $1.46 , respectively. No individual adjustment was material to the Company's consolidated statements of operations and comprehensive income in any of these periods. The Company also enters into other types of contracts, including certain services or commercial arrangements. For such contracts not associated with the design, development, manufacture, or modification of complex equipment, revenues are recognized upon delivery or as services are rendered once persuasive evidence of an arrangement exists, the price is fixed or determinable, and collectibility is reasonably assured. Costs related to these contracts are expensed as incurred.
General and Administrative Expenses	General and Administrative Expenses - In accordance with industry practice and regulations that govern the cost accounting requirements for government contracts, most general corporate expenses incurred at both the segment and corporate locations are allowable and allocable costs on government contracts. These costs are allocated to contracts in progress on a systematic basis, and contract performance factors include this as an element of cost. General and administrative expenses also include certain other costs that are not allocable to government contracts, primarily consisting of the FAS/CAS Adjustment and the provision for deferred state income taxes. The FAS/CAS Adjustment reflects the difference between pension and postretirement benefits expenses determined in accordance with U.S. Financial Accounting Standards ("FAS") and pension and postretirement benefit expenses allocated to individual contracts in accordance with U.S. Cost Accounting Standards ("CAS"). Deferred state income taxes reflect the change in deferred state tax assets and liabilities in the period.
Research and Development	Research and Development - Company-sponsored research and development activities primarily include independent research and development ("IR&D") related to experimentation, design, development, and test activities for government programs. IR&D expenses are included in general and administrative expenses and are generally allocable to government contracts. Company-sponsored IR&D expenses totaled $19 million , $18 million and $22 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Expenses for research and development sponsored by the customer are charged directly to the related contracts.
Product Warranty Costs	Product Warranty Costs - The Company provides certain product warranties that require repair or replacement of non-conforming items for a specified period of time often subject to a specified monetary coverage limit. The Company's product warranties are provided under government contracts, the costs of which are immaterial and are included in contract costs for purposes of using the percentage-of-completion method of accounting.
Environmental Costs	Environmental Costs - Environmental liabilities are accrued when the Company determines remediation costs are probable and such amounts are reasonably estimable. When only a range of amounts is established and no amount within the range is more probable than another, the minimum amount in the range is recorded. Environmental liabilities are recorded on an undiscounted basis and are not material. Environmental expenditures are expensed or capitalized as appropriate. Capitalized expenditures, if any, relate to long-lived improvements in currently operating facilities. The Company does not record insurance recoveries before collection is probable and, as of December 31, 2015 and 2014 , did not have any accrued receivables related to insurance reimbursements or recoveries for environmental matters.
Fair Value of Financial Instruments	Fair Value of Financial Instruments - The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The accounting standard provides a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available. The three levels of inputs consist of: Level 1: Quoted prices in active markets for identical assets and liabilities. Level 2: Observable inputs, other than Level 1 prices, such as: quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or that the Company corroborates with observable market data for substantially the full term of the related assets or liabilities. Level 3: Unobservable inputs supported by little or no market activity that are significant to the fair value of the assets and liabilities. Except for the Company's long-term debt, the carrying amounts of the Company's financial instruments recorded at historical cost approximate fair value due to the short-term nature of the instruments and low credit risk associated with the respective counterparties. The Company maintains multiple grantor trusts established to fund certain non-qualified pension plans. These trusts consist primarily of available-for-sale investments in marketable securities. The assets are held at fair value, a significant majority of investments held in the trusts are valued within Level 1 of the fair value hierarchy, and no material amounts are valued within Level 3 of the fair value hierarchy. These trusts were valued at $74 million and $45 million as of December 31, 2015 and 2014 , respectively, and are presented within miscellaneous other assets within the consolidated statements of financial position.
Foreign Currency Translation	Foreign Currency Translation - The Company's international subsidiaries that do not have the U.S. dollar as their functional currency translate assets and liabilities at current rates of exchange in effect at the balance sheet date. Revenues and expenses from these international subsidiaries are translated using the monthly average exchange rates in effect for the periods in which the items occur. The cumulative foreign currency translation gains and losses are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Gains and losses from foreign currency transactions are included in other income (expense) in the consolidated statements of operations and comprehensive income. Such amounts are not material.
Asset Retirement Obligations	Asset Retirement Obligations - Environmental remediation and/or asset decommissioning may be required when the Company ceases to utilize certain facilities. The Company records, within other current liabilities or other long-term liabilities as appropriate, all known asset retirement obligations for which the liability's fair value can be reasonably estimated, including certain asbestos removal, asset decommissioning, and lease restoration obligations. The changes in the asset retirement obligation carrying amounts for the years ended December 31, 2015 , 2014 , and 2013 , were as follows: ($ in millions) Asset Retirement Obligations Balance as of December 31, 2012 $ 25 Obligation relating to the future retirement of a facility — Revision of estimate — Accretion expense — Balance as of December 31, 2013 25 Obligation relating to the future retirement of a facility — Revision of estimate (2 ) Accretion expense (1 ) Balance as of December 31, 2014 22 Liabilities settled (4 ) Obligation relating to the future retirement of a facility — Revision of estimate (1 ) Accretion expense 1 Balance as of December 31, 2015 $ 18 The Company also has known conditional asset retirement obligations related to assets currently in use, including certain asbestos remediation and asset decommissioning activities to be performed in the future, that were not reasonably estimable as of December 31, 2015 , due to insufficient information about the timing and method of settlement of the obligation. Accordingly, the fair value of these obligations has not been recorded in the consolidated financial statements. In addition, there may be conditional environmental asset retirement obligations that the Company has not yet discovered.
Income Taxes	Income Taxes - Income tax expense and other related information are based on the prevailing statutory rates for U.S. federal income taxes and the composite state income tax rate for the Company for each period presented. Deferred state income taxes reflect the change in deferred state tax assets and liabilities in the relevant period. These amounts are recorded within operating income, while the current period state income tax expense is charged to contract costs and included in cost of sales and service revenues in segment operating income. Deferred income taxes are recorded when revenues and expenses are recognized in different periods for financial statement purposes than for tax return purposes. Deferred tax asset or liability account balances are calculated at the balance sheet date using current tax laws and rates expected to be in effect when the deferred tax items reverse in future periods. The Company recognizes deferred tax assets to the extent it believes that these assets are more likely than not to be realized. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. Based on the Company's evaluation of these deferred tax assets, valuation allowances of $11 million and $14 million were deemed necessary as of December 31, 2015 and 2014 , respectively. Uncertain tax positions meeting the more-likely-than-not recognition threshold, based on the merits of the position, are recognized in the financial statements. The Company recognizes the amount of tax benefit that is greater than 50% likely to be realized upon ultimate settlement with the related tax authority. If a tax position does not meet the minimum statutory threshold to avoid payment of penalties, the Company recognizes an expense for the amount of the penalty in the period the tax position is claimed or expected to be claimed in its tax return. Penalties and accrued interest related to uncertain tax positions are recognized as a component of income tax expense. Changes in accruals associated with uncertain tax positions are recorded in earnings in the period in which they are determined.
Cash and Cash Equivalents	Cash and Cash Equivalents - The carrying amounts of cash and cash equivalents approximate fair value due to the short-term nature of these assets, which have original maturity dates of 90 days or less.
Concentration Risk	Concentration Risk - The Company’s assets that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents. The Company places its cash and cash equivalents with reputable financial institutions and limits the amount of credit exposure with any one of them. The Company regularly evaluates the creditworthiness of these financial institutions and minimizes this credit risk by entering into transactions with high-quality counterparties, limiting the exposure to each counterparty, and monitoring the financial condition of its counterparties. In connection with its U.S. Government contracts, the Company is required to procure certain raw materials, components, and parts from supply sources approved by the U.S. Government. As a result of consolidation in the defense industry, only one supplier exists for certain components and parts required to manufacture the Company's products.
Accounts Receivable	Accounts Receivable - Accounts receivable include amounts billed and currently due from customers, amounts currently due but unbilled, certain estimated contract change amounts, claims or requests for equitable adjustment in negotiation that are probable of recovery, and amounts retained by the customer pending contract completion.
Inventoried Costs	Inventoried Costs - Inventoried costs primarily relate to work in process under contracts that recognize revenues using labor dollars or units of delivery as the basis of the percentage-of-completion calculation. These costs represent accumulated contract costs less cost of sales as calculated using the percentage-of-completion method, not in excess of recoverable value. Accumulated contract costs include direct production costs, factory and engineering overhead, production tooling costs, and, for government contracts, allowable general and administrative expenses. Under the Company's U.S. Government contracts, the customer asserts title to, or a security interest in, inventories related to such contracts as a result of contract advances, performance-based payments, and progress payments. In accordance with industry practice, inventoried costs are classified as a current asset and include amounts related to contracts having production cycles longer than one year. Inventoried costs also include company owned raw materials, which are stated at the lower of cost or market, generally using the average cost method.
Advance Payments and Billings in Excess of Revenues	Advance Payments and Billings in Excess of Revenues - Payments received in excess of inventoried costs and revenues are recorded as advance payment liabilities.
Property, Plant, and Equipment	Property, Plant, and Equipment - Depreciable properties owned by the Company are recorded at cost and depreciated over the estimated useful lives of individual assets. Major improvements are capitalized while expenditures for maintenance, repairs, and minor improvements are expensed. Costs incurred for computer software developed or obtained for internal use are capitalized and amortized over the expected useful life of the software, not to exceed nine years. Leasehold improvements are amortized over the shorter of their useful lives or the term of the lease. The remaining assets are depreciated using the straight-line method, with the following lives: Years Land improvements 3 - 40 Buildings and improvements 3 - 60 Capitalized software costs 3 - 9 Machinery and other equipment 2 - 45 The Company evaluates the recoverability of its property, plant, and equipment when there are changes in economic circumstances or business objectives that indicate the carrying value may not be recoverable. The Company's evaluations include estimated future cash flows, profitability, and other factors affecting fair value. As these assumptions and estimates may change over time, it may or may not be necessary to record impairment charges.
Leases	Leases - The Company uses its incremental borrowing rate in the assessment of lease classification as capital or operating and defines the initial lease term to include renewal options determined to be reasonably assured. The Company conducts operations primarily under operating leases. Many of the Company's real property lease agreements contain incentives for tenant improvements, rent holidays, or rent escalation clauses. For incentives for tenant improvements, the Company records a deferred rent liability and amortizes the deferred rent over the term of the lease as a reduction to rent expense. For rent holidays and rent escalation clauses during the lease term, the Company records minimum rental expenses on a straight-line basis over the term of the lease. For purposes of recognizing lease incentives, the Company uses the date of initial possession as the commencement date, which is generally the date on which the Company is given the right of access to the space and begins to make improvements in preparation for the intended use.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets - The Company performs impairment tests for goodwill as of November 30 of each year and between annual impairment tests if evidence of potential impairment exists, by first comparing the carrying value of net assets to the fair value of the related operations. If the fair value is determined to be less than the carrying value, a second step is performed to determine if goodwill is impaired, by comparing the estimated fair value of goodwill to its carrying value. Purchased intangible assets are amortized on a straight-line basis or a method based on the pattern of benefits over their estimated useful lives, and the carrying value of these assets is reviewed for impairment when events indicate that a potential impairment may have occurred.
Equity Method Investments	Equity Method Investments - Investments in which the Company has the ability to exercise significant influence over the investee but does not own a majority interest or otherwise control are accounted for under the equity method of accounting and included in other assets in its consolidated statements of financial position. The Company's equity investments align strategically and are integrated with the Company's operations, and therefore the Company's share of the net earnings or losses of the investee is included in operating income (loss). The Company evaluates its equity investments for other than temporary impairment whenever events or changes in business circumstances indicate that the carrying amounts of such investments may not be fully recoverable. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period.
Self-Insured Group Medical Insurance and Self-Insured Workers' Compensation Plan	Self-Insured Group Medical Insurance - The Company maintains a self-insured group medical insurance plan. The plan is designed to provide a specified level of coverage for employees and their dependents. Estimated liabilities for incurred but not paid claims utilize actuarial methods based on various assumptions, which include, but are not limited to, HII's historical loss experience and projected loss development factors. These liabilities are recorded in other current liabilities and account for less than 5% of the total current liabilities balance. Self-Insured Workers' Compensation Plan - The operations of the Company are subject to federal and state workers' compensation laws. The Company maintains self-insured workers' compensation plans, in addition to participating in federally administered second injury workers' compensation funds. The Company estimates the required liability of claims and funding requirements on a discounted basis utilizing actuarial methods based on various assumptions, which include, but are not limited to, the Company's historical loss experience and projected loss development factors as compiled in an annual actuarial study. Self-insurance accruals include amounts related to the liability for reported claims and an estimated accrual for claims incurred but not reported. The Company's workers' compensation liability was discounted at 2.12% and 2.48% as of December 31, 2015 and 2014 , respectively. These discount rates were determined using a risk-free rate based on future payment streams. Workers' compensation benefit obligations on an undiscounted basis were $825 million and $846 million as of December 31, 2015 and 2014 , respectively.
Litigation, Commitments, and Contingencies	Litigation, Commitments, and Contingencies - Amounts associated with litigation, commitments, and contingencies are recorded as charges to earnings when management, after taking into consideration the facts and circumstances of each matter, including any settlement offers, has determined that it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated.
Restructuring	Restructuring - The Company has recorded accruals in conjunction with its restructuring activities in other current liabilities. These accruals include estimates primarily related to facility consolidations and closures, asset retirement obligations, long-lived asset write-downs, employment reductions, and contract termination costs. Actual costs may vary from these estimates. Restructuring related accruals are reviewed and adjusted when circumstances require such a change.
Retirement Related Benefit Costs	Retirement Related Benefit Costs - The Company accounts for its retirement related benefit plans on the accrual basis. The measurements of obligations, costs, assets, and liabilities require significant judgment. The costs of benefits provided by defined benefit pension plans are recorded in the period participating employees provide service. The costs of benefits provided by other postretirement benefit plans are recorded in the period participating employees attain full eligibility. The discount rate assumption is defined under GAAP as the rate at which a plan's obligation could be effectively settled. The discount rate is established for each of the retirement related benefit plans at its respective measurement date. The expected return on plan assets component of retirement related costs is used to calculate net periodic expense. Unless plan assets and benefit obligations are subject to remeasurement during the year, the expected return on assets is based on the fair value of plan assets at the beginning of the year. The costs of plan amendments that provide benefits already earned by plan participants (prior service costs and credits) are deferred in accumulated other comprehensive income and amortized over the expected period the employees provide service as of the date of amendment. Actuarial gains and losses arising from differences from actual experience or changes in assumptions are deferred in accumulated other comprehensive income. This unrecognized amount is amortized to the extent it exceeds 10% of the greater of the plan's benefit obligation or plan assets. The amortization period for actuarial gains and losses is the estimated remaining service life of the plan participants, which is approximately 12 years . The Company recognizes the funded status of each retirement related benefit plan as an asset or liability in its consolidated statements of financial position. The funded status represents the difference between the plan's benefit obligation and the fair value of the plan's assets. Unrecognized deferred amounts, such as demographic or asset gains or losses and the impacts of plan amendments, are included in accumulated other comprehensive income and amortized as described above.
Stock Compensation	Stock Compensation - Stock-based compensation value is determined based on the closing market price of the Company's common stock on grant date, and the expense is recognized over the vesting period. At each reporting date, the number of shares is adjusted to equal the number ultimately expected to vest based on the Company's expectations regarding the relevant performance and service criteria.
Related Party Transactions	Related Party Transactions - On March 29, 2011, HII entered into a Separation and Distribution Agreement (the "Separation 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. 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. In connection with the spin-off, HII entered into a Tax Matters Agreement with Northrop Grumman related to taxes prior to the spin-off as described in Note 13: Income Taxes. As of December 31, 2015 and 2014 , the Company was due $31 million and $28 million , respectively, from Northrop Grumman under the Tax Matters Agreement. As of December 31, 2015 and 2014 , the Company had $84 million outstanding under Industrial Revenue Bonds issued by the Mississippi Business Finance Corporation. Prior to the spin-off, repayment of principal and interest was guaranteed by Northrop Grumman Systems Corporation. The guaranty remains in effect, and the Company has agreed to indemnify Northrop Grumman Systems Corporation for any losses related to the guaranty.

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Schedule of Change in Asset Retirement Obligation	The changes in the asset retirement obligation carrying amounts for the years ended December 31, 2015 , 2014 , and 2013 , were as follows: ($ in millions) Asset Retirement Obligations Balance as of December 31, 2012 $ 25 Obligation relating to the future retirement of a facility — Revision of estimate — Accretion expense — Balance as of December 31, 2013 25 Obligation relating to the future retirement of a facility — Revision of estimate (2 ) Accretion expense (1 ) Balance as of December 31, 2014 22 Liabilities settled (4 ) Obligation relating to the future retirement of a facility — Revision of estimate (1 ) Accretion expense 1 Balance as of December 31, 2015 $ 18
Schedule of Depreciable Assets, Straight-Line Method Useful Lives	The remaining assets are depreciated using the straight-line method, with the following lives: Years Land improvements 3 - 40 Buildings and improvements 3 - 60 Capitalized software costs 3 - 9 Machinery and other equipment 2 - 45

Avondale (Tables)

Avondale (Tables)	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Liability for restructuring and shutdown related costs	The following table summarizes the changes in the Company's liability for restructuring and shutdown related costs associated with winding down the Avondale facility. These costs were comprised primarily of employee severance and retention payments, as well as incentive bonuses. As of December 31, 2015 and 2014 , $169 million and $212 million , respectively, of restructuring and shutdown related costs were capitalized in inventoried costs. As of December 31, 2015 and 2014 , $82 million and $48 million , respectively, of accounts receivable were related to restructuring and shutdown related costs. For the years ended December 31, 2015 and 2014 , the Company expensed $55 million and $57 million , respectively, of these costs as part of general and administrative expenses. ($ in millions) Total Balance as of December 31, 2012 $ 24 Payments (27 ) Adjustments 17 Balance as of December 31, 2013 14 Payments (15 ) Adjustments 1 Balance as of December 31, 2014 — Balance as of December 31, 2015 $ —

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2015 , 2014 and 2013 , were as follows: ($ in millions) Benefit Plans Other Total Balance as of December 31, 2012 $ (1,226 ) $ — $ (1,226 ) Other comprehensive income (loss) before reclassifications 1,028 4 1,032 Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (3 ) — (3 ) Amortization of net actuarial loss (gain) 1 134 — 134 Tax benefit (expense) for items of other comprehensive income (456 ) (2 ) (458 ) Net current period other comprehensive income (loss) 703 2 705 Balance as of December 31, 2013 (523 ) 2 (521 ) Other comprehensive income (loss) before reclassifications (603 ) — (603 ) Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (7 ) — (7 ) Amortization of net actuarial loss (gain) 1 52 — 52 Tax benefit (expense) for items of other comprehensive income 217 — 217 Net current period other comprehensive income (loss) (341 ) — (341 ) Balance as of December 31, 2014 (864 ) 2 (862 ) Other comprehensive income (loss) before reclassifications (53 ) (5 ) (58 ) Amounts reclassified from accumulated other comprehensive income (loss) Amortization of prior service cost (credit) 1 (1 ) — (1 ) Amortization of net actuarial loss (gain) 1 88 — 88 Tax benefit (expense) for items of other comprehensive income (13 ) 1 (12 ) Net current period other comprehensive income (loss) 21 (4 ) 17 Balance as of December 31, 2015 $ (843 ) $ (2 ) $ (845 ) 1 These accumulated comprehensive income (loss) components are included in the computation of net periodic benefit cost. See Note 18: Employee Pension and Other Postretirement Benefits. The tax expense associated with amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015 , 2014 , and 2013 , was $30 million , $16 million , and $46 million , respectively.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share	Basic and diluted earnings per common share were calculated as follows: Year Ended December 31 (in millions, except per share amounts) 2015 2014 2013 Net earnings (loss) $ 404 $ 338 $ 261 Weighted-average common shares outstanding 47.9 48.8 49.7 Net effect of dilutive stock options and awards 0.4 0.5 0.7 Dilutive weighted-average common shares outstanding 48.3 49.3 50.4 Earnings (loss) per share - basic $ 8.43 $ 6.93 $ 5.25 Earnings (loss) per share - diluted $ 8.36 $ 6.86 $ 5.18

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Operating Profit (Loss) Reconciliation [Table Text Block]	Results of Operations by Segment Year Ended December 31 ($ in millions) 2015 2014 2013 Sales and Service Revenues Ingalls $ 2,188 $ 2,286 $ 2,441 Newport News 4,700 4,536 4,382 Other 134 137 — Intersegment eliminations (2 ) (2 ) (3 ) Total sales and service revenues $ 7,020 $ 6,957 $ 6,820 Operating Income (Loss) Ingalls $ 379 $ 229 $ 165 Newport News 422 415 402 Other (134 ) (59 ) — Total segment operating income (loss) 667 585 567 Non-segment factors affecting operating income (loss) FAS/CAS Adjustment 104 72 (61 ) Deferred state income taxes (2 ) (2 ) 6 Total operating income (loss) $ 769 $ 655 $ 512
Segment Assets Reconciliation [Table Text Block]	The following tables present, by segment, the Company's assets, capital expenditures, and depreciation and amortization. December 31 ($ in millions) 2015 2014 2013 Assets Ingalls $ 1,324 $ 1,452 1,663 Newport News 3,286 3,155 3,111 Other 78 210 — Corporate (1) 1,336 1,422 1,416 Total assets $ 6,024 $ 6,239 $ 6,190 (1) Includes $30 million and $35 million of debt issuance costs reclassified between miscellaneous other assets and long-term debt as of December 31, 2014 and 2013, respectively.
Segment Other Significant Items Reconciliation [Table Text Block]	Year Ended December 31 ($ in millions) 2015 2014 2013 Capital Expenditures Ingalls $ 53 $ 53 $ 44 Newport News 134 109 93 Other 1 3 — Corporate — — 2 Total capital expenditures $ 188 $ 165 $ 139 Year Ended December 31 ($ in millions) 2015 2014 2013 Depreciation and Amortization (1) Ingalls $ 65 $ 81 $ 125 Newport News 106 105 100 Other 9 8 — Corporate — — 1 Total depreciation and amortization $ 180 $ 194 $ 226 (1) Excluding amortization of debt issuance costs

Accounts Receivable, Net (Table

Accounts Receivable, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Accounts receivable, net	Accounts receivable were composed of the following: December 31 ($ in millions) 2015 2014 Due From U.S. Government Amounts billed $ 197 $ 180 Recoverable costs and accrued profit on progress completed - unbilled 783 766 980 946 Due From Other Customers Amounts billed 39 64 Recoverable costs and accrued profit on progress completed - unbilled 59 35 98 99 Total accounts receivable 1,078 1,045 Allowances for doubtful accounts (4 ) (7 ) Total accounts receivable, net $ 1,074 $ 1,038

Inventoried Costs, Net (Tables)

Inventoried Costs, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventoried costs, net	Inventoried costs were composed of the following: December 31 ($ in millions) 2015 2014 Production costs of contracts in process $ 193 $ 248 Raw material inventory 92 91 Total inventoried costs, net $ 285 $ 339

Goodwill and Other Intangible36

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Change in Carrying Amount of Goodwill	For the years ended December 31, 2015 and 2014 , the carrying amounts of goodwill changed as follows: ($ in millions) Ingalls Newport News Other Total Balance as of December 31, 2013 $ 175 $ 706 $ — $ 881 Acquisitions — 42 150 192 Goodwill impairment — — (47 ) (47 ) Balance as of December 31, 2014 175 748 103 1,026 Acquisitions — 4 — 4 Adjustments — — 1 1 Goodwill impairment — — (75 ) (75 ) Balance as of December 31, 2015 $ 175 $ 752 $ 29 $ 956
Purchased Intangible Assets	The following table summarizes the Company's aggregate purchased intangible assets, which are primarily program related intangible assets. December 31 ($ in millions) 2015 2014 Gross carrying amount $ 987 $ 986 Impairment (27 ) — Accumulated amortization (465 ) (439 ) Net carrying amount $ 495 $ 547

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal Income Tax Expense	Federal income tax expense for the years ended December 31, 2015 , 2014 , and 2013 , consisted of the following: Year Ended December 31 ($ in millions) 2015 2014 2013 Income Taxes on Operations Federal income taxes currently payable $ 242 $ 191 $ 150 Change in deferred federal income taxes (14 ) (22 ) (17 ) Total federal income taxes $ 228 $ 169 $ 133
Reconciliation of Income Tax Expense to Federal Statutory Rate	Income tax expense differed from the amount based on the statutory federal income tax rate applied to earnings (loss) before income taxes due to the following: Year Ended December 31 ($ in millions) 2015 2014 2013 Income tax expense (benefit) on operations at statutory rate $ 221 $ 178 $ 138 Goodwill impairment 11 6 — Manufacturing deduction (10 ) (9 ) (7 ) Research tax credit — — (2 ) Other, Net 6 (6 ) 4 Total federal income taxes $ 228 $ 169 $ 133
Change in Unrecognized Tax Benefits	The changes in unrecognized tax benefits (exclusive of interest and penalties) for the years ended December 31, 2015 , 2014 , and 2013 are summarized in the following table: December 31 ($ in millions) 2015 2014 2013 Unrecognized tax benefits at beginning of the year $ 19 $ 11 $ 19 Additions based on tax positions related to the current year 8 5 5 Additions based on tax positions of prior years 3 3 1 Current year acquisitions — 4 — Reductions based on tax positions of prior years — — (14 ) Settlements (1 ) — — Statute of limitation expirations (2 ) (4 ) — Net change in unrecognized tax benefits 8 8 (8 ) Unrecognized tax benefits at end of the year $ 27 $ 19 $ 11
Summary of Income Tax Examinations	The following table summarizes the tax years that are either currently under examination or remain open under the applicable statute of limitations and subject to examination by the major tax jurisdictions in which the Company operates: Jurisdiction Years United States 2007 - 2014 California 2010 - 2014 Louisiana 2012 - 2014 Mississippi 2012 - 2014 Virginia 2012 - 2014
Net Deferred Tax Assets	The tax effects of significant temporary differences and carry-forwards that gave rise to year-end deferred federal and state tax balances, as presented in the consolidated statements of financial position, were as follows: December 31 ($ in millions) 2015 2014 Deferred Tax Assets Retirement benefits $ 571 $ 592 Workers' compensation 263 256 Reserves not currently deductible for tax purposes 21 9 Stock-based compensation 19 14 Net operating losses and tax credit carry-forwards 17 20 Other 12 9 Gross deferred tax assets 903 900 Less valuation allowance 11 14 Net deferred tax assets 892 886 Deferred Tax Liabilities Depreciation and amortization 310 297 Contract accounting differences 85 53 Purchased intangibles 161 195 Gross deferred tax liabilities 556 545 Total net deferred tax assets $ 336 $ 341

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consisted of the following: December 31 ($ in millions) 2015 2014 Term loan due March 30, 2016 $ — $ 395 Senior notes due March 15, 2021, 7.125% — 600 Senior notes due December 15, 2021, 5.000% 600 600 Senior notes due November 15, 2025, 5.000% 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 Less unamortized debt issuance costs (32 ) (30 ) Total long-term debt 1,273 1,670 Less current portion — 108 Long-term debt, net of current portion $ 1,273 $ 1,562
Schedule of Extinguishment of Debt [Table Text Block]	Details of the loss on early extinguishment of debt related to the Amended Credit Facility and refinancing of senior notes, which was included in interest expense, were as follows: December 31 ($ in millions) 2015 2014 Redemption and tender premiums and fees $ 33 $ 31 Write-off of unamortized debt issuance costs 11 6 Total loss on early extinguishment of debt $ 44 $ 37

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Minimum Rental Commitments Under Long-Term Non-Cancellable Operating Leases	Minimum rental commitments under long-term non-cancellable operating leases for each of the years 2016 through 2020 and thereafter are: ($ in millions) 2016 $ 35 2017 30 2018 27 2019 23 2020 19 Thereafter 63 Total $ 197

Employee Pension and Other Po40

Employee Pension and Other Postretirement Benefits Employee Pension and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Schedule of Net Benefit Costs	The costs of the Company's defined benefit pension plans and other postretirement plans for the years ended December 31, 2015 , 2014 and 2013 , were as follows: Pension Benefits Other Benefits Year Ended December 31 Year Ended December 31 ($ in millions) 2015 2014 2013 2015 2014 2013 Components of Net Periodic Benefit Cost Service cost $ 150 $ 136 $ 147 $ 13 $ 13 $ 21 Interest cost 242 253 215 27 30 33 Expected return on plan assets (351 ) (322 ) (289 ) — — — Amortization of prior service cost (credit) 19 19 18 (20 ) (26 ) (21 ) Amortization of net actuarial loss (gain) 86 52 118 2 — 16 Curtailments — — (1 ) — — — Net periodic benefit cost $ 146 $ 138 $ 208 $ 22 $ 17 $ 49
Schedule of Defined Benefit Plans Disclosures	The funded status of the Company's plans as of December 31, 2015 and 2014 , was as follows: Pension Benefits Other Benefits December 31 December 31 ($ in millions) 2015 2014 2015 2014 Change in Benefit Obligation Benefit obligation at beginning of year $ 5,671 $ 4,730 $ 650 $ 616 Service cost 150 136 13 13 Interest cost 242 253 27 30 Plan participants' contributions 11 26 6 7 Actuarial loss (gain) (254 ) 714 (91 ) 24 Benefits paid (185 ) (168 ) (39 ) (40 ) Curtailments — (20 ) — — Benefit obligation at end of year 5,635 5,671 566 650 Change in Plan Assets Fair value of plan assets at beginning of year 4,731 4,310 — — Actual return on plan assets (47 ) 437 — — Employer contributions 103 126 33 33 Plan participants' contributions 11 26 6 7 Benefits paid (185 ) (168 ) (39 ) (40 ) Fair value of plan assets at end of year 4,613 4,731 — — Funded status $ (1,022 ) $ (940 ) $ (566 ) $ (650 ) Amounts Recognized in the Consolidated Statements of Financial Position: Pension plan assets $ — $ 17 $ — $ — Current liability (1) (21 ) (18 ) (143 ) (143 ) Non-current liability (2) (1,001 ) (939 ) (423 ) (507 ) Accumulated other comprehensive loss (income) (pre-tax) related to: Prior service costs (credits) 86 105 (105 ) (125 ) Net actuarial loss (gain) 1,433 1,374 (21 ) 73 (1) Included in other current liabilities and current portion of postretirement plan liabilities, respectively. (2) Included in pension plan liabilities and other postretirement plan liabilities, respectively.
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The changes in amounts recorded in accumulated other comprehensive income (loss) were as follows: Pension Benefits Other Benefits Year Ended December 31 Year Ended December 31 ($ in millions) 2015 2014 2013 2015 2014 2013 Prior service cost (credit) $ — $ — $ (66 ) $ — $ — $ 145 Amortization of prior service cost (credit) 19 19 18 (20 ) (26 ) (21 ) Net actuarial loss (gain) (144 ) (599 ) 716 91 (24 ) 220 Amortization of net actuarial loss (gain) 86 52 118 2 — 16 Other (1 ) 20 12 1 — 1 Total changes in accumulated other comprehensive income (loss) $ (40 ) $ (508 ) $ 798 $ 74 $ (50 ) $ 361
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year	The amounts included in accumulated other comprehensive income (loss) as of December 31, 2015 , expected to be recognized as components of net periodic expense in 2016 were as follows: ($ in millions) Pension Benefits Other Benefits Prior service cost (credit) $ 18 $ (19 ) Net loss 84 (5 ) Total $ 102 $ (24 )
Schedule of Assumptions Used and Health Care Cost Trend Rates	The weighted average assumptions used to determine the net periodic benefit costs for each year ended December 31 were as follows: Pension Benefits ($ in millions) 2015 2014 2013 Discount rate 4.34 % 5.27 % 4.27 % Expected long-term rate on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 3.64 % 3.69 % 3.66 % Other Benefits ($ in millions) 2015 2014 2013 Discount rate 4.22 % 5.03 % 4.02 % Initial health care cost trend rate assumed for next year 7.00 % 7.33 % 7.67 % Gradually declining to a rate of 5.00 % 5.00 % 5.00 % Year in which the rate reaches the ultimate rate 2023 2022 2021 The weighted average assumptions used to determine the benefit obligations as of December 31 of each year were as follows: Pension Benefits Other Benefits December 31 December 31 ($ in millions) 2015 2014 2015 2014 Discount rate 4.73 % 4.34 % 4.58 % 4.22 % Rate of compensation increase 3.66 % 3.64 % Initial health care cost trend rate assumed for next year 7.00 % 7.00 % Gradually declining to a rate of 5.00 % 5.00 % Year in which the rate reaches the ultimate rate 2024 2023
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	A one percent change in the assumed health care cost trend rates would have the following effects on 2015 results: 1 Percentage Point ($ in millions) Increase Decrease Effect on postretirement benefit expense $ 2 $ (2 ) Effect on postretirement benefit obligations 22 (20 )
Schedule of Defined Benefit Plans Disclosures, Cash Contributions	The Company made the following contributions to its pension and other postretirement plans for the years ended December 31, 2015 , 2014 , and 2013 : Year Ended December 31 ($ in millions) 2015 2014 2013 Pension plans Discretionary Qualified $ 99 $ 123 $ 301 Non-qualified 4 3 4 Other benefit plans 33 33 38 Total contributions $ 136 $ 159 $ 343
Schedule of Expected Benefit Payments and Prescription Drug Subsidy Receipts	The following table presents estimated future benefit payments, using the same assumptions used in determining the Company's benefit obligations as of December 31, 2015 . Benefit payments depend on future employment and compensation levels, years of service, and mortality. Changes in any of these factors could significantly affect these estimated amounts. Other Benefits ($ in millions) Pension Benefits Benefit Payments Subsidy Receipts 2016 $ 204 $ 37 $ — 2017 217 38 — 2018 231 40 — 2019 246 41 — 2020 263 42 — Years 2021 to 2025 $ 1,617 $ 214 $ 2
Schedule of Allocation of Plan Assets	The Investment Committee has set the minimum and maximum permitted values for each asset class in the Company's pension plan master trust for the year ended December 31, 2015 , as follows: Range U.S. equities 20 - 42% International equities 15 - 33% Fixed income securities 25 - 50% Alternative investments 5 - 15% The fair values of the Company's retirement plan assets by asset category and by valuation hierarchy level as described in Note 2: Summary of Significant Accounting Policies were as follows: December 31, 2015 ($ in millions) Total Level 1 Level 2 Level 3 Asset Category Equity U.S. equities (1) $ 1,392 $ 460 $ 932 $ — International equities (1) 1,074 597 477 — Fixed Income U.S. government 175 — 175 — U.S. agency 171 — 171 — Non-U.S. government 70 — 70 — Investment grade (2) 1,008 — 1,008 — Asset backed 39 — 39 — Non-investment grade (3) 40 — 40 — Cash and cash equivalents (4) 45 5 40 — Hedge funds 312 — — 312 Real estate fund 285 — — 285 Other 2 — 2 — Total assets at fair value $ 4,613 $ 1,062 $ 2,954 $ 597 (1) U.S. and international equity securities include investments in small, medium, and large capitalization stocks of public companies held in separately managed accounts or commingled trust funds. (2) Investment grade fixed income securities include corporate bonds rated Baa3/BBB- or higher by one or more rating agencies. (3) Non-investment grade fixed income securities include corporate bonds consistently rated below Baa3/BBB- by one or more rating agencies and units of a high yield commingled fund. (4) Cash and cash equivalents are highly liquid short-term investment funds and include net receivables and payables of the trust. These funds are available for immediate use to fund daily operations, execute investment policies, and serve as a temporary investment vehicle. The Company's plan asset allocation policy does not include cash. December 31, 2014 ($ in millions) Total Level 1 Level 2 Level 3 Asset Category Equity U.S. equities (1) $ 1,423 $ 467 $ 956 $ — International equities (1) 1,082 599 483 — Fixed Income U.S. government 237 — 237 — U.S. agency 174 — 174 — Non-U.S. government 88 — 88 — Investment grade (2) 1,041 — 1,041 — Asset backed 52 — 52 — Non-investment grade (3) 45 — 45 — Cash and cash equivalents (4) 42 5 37 — Hedge funds 298 — — 298 Real estate fund 247 — — 247 Other 2 — 2 — Total assets at fair value $ 4,731 $ 1,071 $ 3,115 $ 545 (1) U.S. and international equity securities include investments in small, medium, and large capitalization stocks of public companies held in separately managed accounts or commingled trust funds. (2) Investment grade fixed income securities include corporate bonds rated Baa3/BBB- or higher by one or more rating agencies. (3) Non-investment grade fixed income securities include corporate bonds consistently rated below Baa3/BBB- by one or more rating agencies and units of a high yield commingled fund. (4) Cash and cash equivalents are highly liquid short-term investment funds and include net receivables and payables of the trust. These funds are available for immediate use to fund daily operations, execute investment policies, and serve as a temporary investment vehicle. The Company's plan asset allocation policy does not include cash.
Schedule of Level Three Defined Benefit Plan Assets Roll Forward	The following tables summarize the changes in Level 3 retirement plan assets measured at fair value for the years ended December 31, 2015 and 2014 . Return on plan assets Attributable to Assets Held at December 31, 2015 Fair Value at December 31, 2014 Attributable to Assets Sold Transfers Fair Value at December 31, 2015 Into (Out) of ($ in millions) Purchases Sales Level 3 Level 3 Asset Category: Hedge funds $ 298 $ 14 $ — $ — $ — $ — $ — $ 312 Real estate fund 247 38 — — — — — 285 Total Level 3 fair value $ 545 $ 52 $ — $ — $ — $ — $ — $ 597 Return on plan assets Attributable to Assets Held at December 31, 2014 Fair Value at December 31, 2013 Attributable to Assets Sold Transfers Fair Value at December 31, 2014 Into (Out) of ($ in millions) Purchases Sales Level 3 Level 3 Asset Category: Hedge funds $ 257 $ 19 $ — $ 22 $ — $ — $ — $ 298 Real estate fund 188 24 — 35 — — — 247 Total Level 3 fair value $ 445 $ 43 $ — $ 57 $ — $ — $ — $ 545

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Status of Stock Awards	The stock award activity for the years ended December 31, 2015 , 2014 , and 2013 , was as follows: Stock Awards (in thousands) Weighted-Average Grant Date Fair Value Weighted Average Remaining Contractual Term Outstanding as of December 31, 2012 1,901 $ 39.92 1.4 years Granted 456 46.51 Adjustment due to performance 315 41.41 Vested (931 ) 41.41 Forfeited (68 ) 40.23 Outstanding as of December 31, 2013 1,673 40.92 1.0 year Granted 246 98.33 Adjustment due to performance 918 41.45 Vested (1,510 ) 41.45 Forfeited (16 ) 45.19 Outstanding as of December 31, 2014 1,311 51.23 0.7 years Granted 163 140.48 Adjustment due to performance 315 36.36 Vested (865 ) 36.36 Forfeited (33 ) 83.44 Outstanding as of December 31, 2015 891 $ 75.73 0.6 years
Schedule of Status of Stock Options	The stock option activity for the years ended December 31, 2015 , 2014 , and 2013 , was as follows: Shares Under Option (in thousands) Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value ($ in millions) Outstanding as of December 31, 2012 1,166 $ 34.67 2.6 years $ 12 Exercised (346 ) 29.66 Canceled and Forfeited (1 ) 28.51 Outstanding as of December 31, 2013 819 35.01 2.1 years 45 Exercised (174 ) 31.11 Canceled and Forfeited (1 ) 31.76 Outstanding as of December 31, 2014 644 36.06 1.4 years 49 Exercised (111 ) 46.46 Outstanding as of December 31, 2015 533 $ 33.90 0.6 years $ 50 Vested as of December 31, 2015 533 $ 33.90 0.6 years $ 50

Unaudited Selected Quarterly 42

Unaudited Selected Quarterly Data (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Financial Results	Unaudited quarterly financial results for the years ended December 31, 2015 and 2014 , are set forth in the following tables: Year Ended December 31, 2015 ($ in millions, except per share amounts) 1st Qtr 2nd Qtr (1) 3rd Qtr 4th Qtr (2) Sales and service revenues $ 1,570 $ 1,745 $ 1,800 $ 1,905 Operating income (loss) 156 269 200 144 Earnings (loss) before income taxes 133 244 175 80 Net earnings (loss) 87 156 111 50 Dividends declared per share $ 0.40 $ 0.40 $ 0.40 $ 0.50 Basic earnings (loss) per share $ 1.80 $ 3.22 $ 2.31 $ 1.07 Diluted earnings (loss) per share $ 1.79 $ 3.20 $ 2.29 $ 1.06 (1) In the second quarter of 2015, the Company recorded a $59 million goodwill impairment charge. During the same period, the Company recorded $136 million of operating income as a result of the Aon settlement. (2) In the fourth quarter of 2015, the Company recorded $16 million goodwill impairment and $27 million intangible asset impairment charges. Year Ended December 31, 2014 ($ in millions, except per share amounts) 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr (3) Sales and service revenues $ 1,594 $ 1,719 $ 1,717 $ 1,927 Operating income (loss) 159 181 171 144 Earnings (loss) before income taxes 132 152 144 79 Net earnings (loss) 90 100 96 52 Dividends declared per share $ 0.20 $ 0.20 $ 0.20 $ 0.40 Basic earnings (loss) per share $ 1.83 $ 2.05 $ 1.97 $ 1.07 Diluted earnings (loss) per share $ 1.81 $ 2.04 $ 1.96 $ 1.05 (3) In the fourth quarter of 2014, the Company recorded a $47 million goodwill impairment charge.

Description of Business (Narrat

Description of Business (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015segments
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	3

Summary of Significant Accoun44

Summary of Significant Accounting Policies Schedule of Concentration Risk (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015
Sales Revenue, Net | Zero profit margin contracts [Member]
Concentration Risk [Line Items]
Concentration Risk	1.00%

Summary of Significant Accoun45

Summary of Significant Accounting Policies Change in Accounting Estimate (Narrative) (Details) - Contracts Accounted for under Percentage of Completion - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in Accounting Estimate
Increase (decrease) in operating income due to net cumulative catch-up adjustments	$ 239	$ 222	$ 113
Increase (decrease) in diluted earnings per share due to net cumulative catch-up adjustments	$ 3.21	$ 2.93	$ 1.46

Summary of Significant Accoun46

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Long-term debt	$ 1,273	$ 1,670
Assets Held-in-trust [Abstract]
Assets held in rabbi trusts	74	45
Independent research and development	19	18	$ 22
Deferred tax asset valuation allowance	$ 11	$ 14
Percent likliehood of unfavorable settlement of uncertain income tax benefit	50.00%
Maturity period of cash equivalents	90 days
Workers' compensation discount rate	2.12%	2.48%
Workers' compensation benefit obligations on an undiscounted basis	$ 825	$ 846
Amortization threshold for actuarial gains (losses)	10.00%
Amortization period of actuarial gains (losses)	12 years
Computer software
Acquired Finite-Lived Intangible Assets [Line Items]
Maximum useful life	9 years
Former Parent [Member] | Northrop Grumman | Tax Matters Agreement
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 31	$ 28
Self-Insured Group Medical Insurance Risk | Other Current Liabilities
Acquired Finite-Lived Intangible Assets [Line Items]
Concentration Risk	5.00%

Summary of Significant Accoun47

Summary of Significant Accounting Policies Schedule of Change in Asset Retirement Obligation (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis
Balance, beginning	$ 22	$ 25	$ 25
Liabilities settled	(4)
Obligation relating to the future retirement of a facility			0
Revision of estimate	(1)	(2)	0
Accretion expense	1	(1)	0
Balance, ending	$ 18	$ 22	$ 25

Summary of Significant Accoun48

Summary of Significant Accounting Policies Schedule of Depreciable Assets (Table) (Details)	12 Months Ended
	Dec. 31, 2015
Land improvements | Minimum
Property, Plant and Equipment
Useful life	3 years
Land improvements | Maximum
Property, Plant and Equipment
Useful life	40 years
Buildings and improvements | Minimum
Property, Plant and Equipment
Useful life	3 years
Buildings and improvements | Maximum
Property, Plant and Equipment
Useful life	60 years
Capitalized software costs | Minimum
Property, Plant and Equipment
Useful life	3 years
Capitalized software costs | Maximum
Property, Plant and Equipment
Useful life	9 years
Machinery and other equipment | Minimum
Property, Plant and Equipment
Useful life	2 years
Machinery and other equipment | Maximum
Property, Plant and Equipment
Useful life	45 years

Accounting Standards Updates (N

Accounting Standards Updates (Narrative ) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term deferred tax assets	$ 336	$ 341
Debt issuance costs	$ 32	30	$ 35
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred current tax assets		(129)
Long-term deferred tax assets		$ 129

Avondale (Narrative) (Details)

Avondale (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Amount in question by DCAA	$ 57
Total | Avondale Wind Down
Restructuring Cost and Reserve [Line Items]
Estimated total costs	287
Estimated total costs, initial estimate			$ 310
Restructuring and Related Costs, Capitalized in Inventory	169	$ 212
Accounts receivable related to restructuring	82	48
Restructuring and Related Costs, Amortized	$ 55	$ 57

Avondale Restructuring and Shut

Avondale Restructuring and Shutdown Related Costs (Table) (Details) - Facility Closing - Avondale Wind Down - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restructuring Reserve [Roll Forward]
Beginning balance	$ 14	$ 24
Payments	(15)	(27)
Adjustments	$ 1	17
Ending balance		$ 14

Gulfport (Narrative) (Details)

Gulfport (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Proceeds from disposition of assets	$ 32
Gain on disposition	9
Facility Closing | Gulfport
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	54
Accelerated depreciation restructuring cost	52
Other restructuring cost	2
Accounts receivable related to restructuring	$ 35	$ 37

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 4	$ 192
Business Acquisition, Goodwill, Expected Tax Deductible Amount	96
Undersea Solutions Group [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	6
Goodwill, Acquired During Period	4
Intangible assets	$ 1
UniversalPegasus International [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		225
Cash Acquired from Acquisition		5
Goodwill, Acquired During Period		150
Intangible assets		41
The S.M. Stoller Corporation [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		47
Cash Acquired from Acquisition		6
Goodwill, Acquired During Period		42
Intangible assets		$ 6

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Common stock, shares issued	52,000,000				51,500,000				52,000,000	51,500,000
Common stock, shares outstanding	46,900,000				48,300,000				46,900,000	48,300,000
Amount authorized for stock repurchase program												$ 1,200	$ 600	$ 300	$ 150
Repurchased shares of treasury stock									1,987,550	1,407,729	1,722,991
Treasury stock activity									$ 234	$ 138	$ 119
Remaining authorized stock repurchase amount									$ 2
Dividends declared per share	$ 0.50	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.20	$ 0.20	$ 0.20	$ 1.70	$ 1	$ 0.50
Dividends declared									$ (81)	$ (49)	$ (25)
Accumulated other comprehensive income (loss)	$ (845)				$ (862)				(845)	(862)	(521)					$ (1,226)
Defined Benefit Plans
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(843)				(864)				(843)	(864)	(523)					$ (1,226)
Unrealized Investment Gain (Loss)
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (2)				$ 2				$ (2)	$ 2	$ 2

Stockholders' Equity Accumulate

Stockholders' Equity Accumulated Other Comprehensive Income (Loss) (Table) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning		$ (862)	$ (521)	$ (1,226)
Other comprehensive income (loss) before reclassifications		(58)	(603)	1,032
Amortization of prior service cost (credit)	[1]	(1)	(7)	(3)
Amortization of net actuarial loss (gain)	[1]	88	52	134
Tax benefit (expense) for items of other comprehensive income		(12)	217	(458)
Net current period other comprehensive income (loss)		17	(341)	705
Balance, ending		(845)	(862)	(521)
Income tax expense (benefit)		228	169	133
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning		(864)	(523)	(1,226)
Other comprehensive income (loss) before reclassifications		(53)	(603)	1,028
Amortization of prior service cost (credit)	[1]	(1)	(7)	(3)
Amortization of net actuarial loss (gain)	[1]	88	52	134
Tax benefit (expense) for items of other comprehensive income		(13)	217	(456)
Net current period other comprehensive income (loss)		21	(341)	703
Balance, ending		(843)	(864)	(523)
Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning		2	2
Other comprehensive income (loss) before reclassifications		(5)		4
Tax benefit (expense) for items of other comprehensive income		1		(2)
Net current period other comprehensive income (loss)		(4)		2
Balance, ending		(2)	2	2
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax expense (benefit)		$ 30	$ 16	$ 46
[1]	These accumulated comprehensive income (loss) components are included in the computation of net periodic benefit cost. See Note 18: Employee Pension and Other Postretirement Benefits. The tax expense associated with amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015, 2014, and 2013, was $30 million, $16 million, and $46 million, respectively.

Basic and Diluted Earnings Per

Basic and Diluted Earnings Per Share (Table) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended											12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	Jun. 30, 2015	[2]	Mar. 31, 2015	Dec. 31, 2014	[3]	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings (loss)	$ 50		$ 111	$ 156		$ 87	$ 52		$ 96	$ 100	$ 90	$ 404	$ 338	$ 261
Weighted-average common shares outstanding (in shares)												47.9	48.8	49.7
Net effect of dilutive												0.4	0.5	0.7
Dilutive weighted-average common shares outstanding												48.3	49.3	50.4
Earnings (loss) per share - basic	$ 1.07		$ 2.31	$ 3.22		$ 1.80	$ 1.07		$ 1.97	$ 2.05	$ 1.83	$ 8.43	$ 6.93	$ 5.25
Earnings (loss) per share - diluted	$ 1.06		$ 2.29	$ 3.20		$ 1.79	$ 1.05		$ 1.96	$ 2.04	$ 1.81	$ 8.36	$ 6.86	$ 5.18
[1]	In the fourth quarter of 2015, the Company recorded $16 million goodwill impairment and $27 million intangible asset impairment charges.
[2]	In the second quarter of 2015, the Company recorded a $59 million goodwill impairment charge. During the same period, the Company recorded $136 million of operating income as a result of the Aon settlement.
[3]	In the fourth quarter of 2014, the Company recorded a $47 million goodwill impairment charge.

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Options
Securities Excluded from Computation of Earnings Per Share
Securities excluded from computation of earnings per share	0.3	0.4	0.5
Restricted stock rights
Securities Excluded from Computation of Earnings Per Share
Securities excluded from computation of earnings per share			0.3
Restricted performance stock rights
Securities Excluded from Computation of Earnings Per Share
Securities excluded from computation of earnings per share	0.7	1.1	1

Segment Information (Narrative)

Segment Information (Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)segments	Dec. 31, 2014USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segments			3
Goodwill Impairment	$ 16	$ 59	$ 75	$ 47
Impairment of Intangible Assets (Excluding Goodwill)	$ 27
Government Contracts Concentration Risk | Sales Revenue, Net
Segment Reporting Information [Line Items]
Concentration Risk			95.00%

Segment Operating Profit (Loss)

Segment Operating Profit (Loss) Reconciliation (Table) (Details) - USD ($) $ in Millions	3 Months Ended											12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015		Mar. 31, 2015	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales and service revenues	$ 1,905		$ 1,800	$ 1,745		$ 1,570	$ 1,927		$ 1,717	$ 1,719	$ 1,594	$ 7,020	$ 6,957	$ 6,820
Operating income (loss)	$ 144	[1]	$ 200	$ 269	[2]	$ 156	$ 144	[3]	$ 171	$ 181	$ 159	769	655	512
Ingalls [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales and service revenues												2,188	2,286	2,441
Operating income (loss)												379	229	165
Newport News Shipbuilding [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales and service revenues												4,700	4,536	4,382
Operating income (loss)												422	415	402
Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales and service revenues												134	137
Operating income (loss)												(134)	(59)
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales and service revenues												(2)	(2)	(3)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)												667	585	567
Segment Reconciling Items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
FAS/CAS Adjustment												104	72	(61)
Deferred state income taxes												$ (2)	$ (2)	$ 6
[1]	In the fourth quarter of 2015, the Company recorded $16 million goodwill impairment and $27 million intangible asset impairment charges.
[2]	In the second quarter of 2015, the Company recorded a $59 million goodwill impairment charge. During the same period, the Company recorded $136 million of operating income as a result of the Aon settlement.
[3]	In the fourth quarter of 2014, the Company recorded a $47 million goodwill impairment charge.

Segment Information Segment Ass

Segment Information Segment Assets Reconciliation (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 6,024	$ 6,239		$ 6,190
Debt issuance costs	32	30		35
Ingalls [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,324	1,452		1,663
Newport News Shipbuilding [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,286	3,155		3,111
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	78	210
Corporate Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,336	$ 1,422	[1]	$ 1,416	[1]
[1]	Includes $30 million and $35 million of debt issuance costs reclassified between miscellaneous other assets and long-term debt as of December 31, 2014 and 2013, respectively.

Segment Information Segment Oth

Segment Information Segment Other Significant Items Reconciliation (Table) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital Expenditures		$ 188	$ 165	$ 139
Depreciation and amortization	[1]	180	194	226
Ingalls [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital Expenditures		53	53	44
Depreciation and amortization	[1]	65	81	125
Newport News Shipbuilding [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital Expenditures		134	109	93
Depreciation and amortization	[1]	106	105	100
Other [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital Expenditures		1	3
Depreciation and amortization	[1]	$ 9	$ 8
Corporate Segment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital Expenditures				2
Depreciation and amortization	[1]			$ 1
[1]	Excluding amortization of debt issuance costs

Accounts Receivable, Net (Narra

Accounts Receivable, Net (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Retainage provision in long-term contracts	$ 24	$ 38
Accounts receivable expected to be collected in 2017	121
Accounts receivable expected to be collected in and after 2018	$ 115

Accounts Receivable, Net (Tab63

Accounts Receivable, Net (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 1,078	$ 1,045
Allowance for doubtful accounts	(4)	(7)
Total accounts receivable, net	1,074	1,038
Due From U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed	197	180
Recoverable costs and accrued profit on progress completed - unbilled	783	766
Accounts receivable	980	946
Due From Other Customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed	39	64
Recoverable costs and accrued profit on progress completed - unbilled	59	35
Accounts receivable	$ 98	$ 99

Inventoried Costs, Net (Table)

Inventoried Costs, Net (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Production costs of contracts in process	$ 193	$ 248
Raw material inventory	92	91
Total inventoried costs, net	$ 285	$ 339

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)reporting_unit	Dec. 31, 2014USD ($)	Nov. 30, 2015
Goodwill [Line Items]
Number of reporting units | reporting_unit			4
Goodwill Impairment	$ (16)	$ (59)	$ (75)	$ (47)
Accumulated goodwill impairment losses	2,877		2,877	2,802
Goodwill, Acquired During Period			4	192
Goodwill reclassification adjustment				23
Net carrying amount	495		495	547
Undersea Solutions Group [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period			4
The S.M. Stoller Corporation [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period				42
UniversalPegasus International [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period				150
Ingalls [Member]
Goodwill [Line Items]
Accumulated goodwill impairment losses	1,568		1,568	1,568
Newport News Shipbuilding [Member]
Goodwill [Line Items]
Accumulated goodwill impairment losses	1,187		1,187	1,187
Goodwill, Acquired During Period			4	42
Other [Member]
Goodwill [Line Items]
Goodwill Impairment	(16)	$ (59)	(75)	(47)
Accumulated goodwill impairment losses	$ 122		$ 122	47
Goodwill, Acquired During Period				$ 150
Minimum | Ingalls [Member]
Goodwill [Line Items]
Minimum excess of carrying value over fair value					10.00%
Minimum | Newport News Shipbuilding [Member]
Goodwill [Line Items]
Minimum excess of carrying value over fair value					10.00%

Change in Carrying Amount of Go

Change in Carrying Amount of Goodwill (Table) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill beginning balance			$ 1,026	$ 881
Goodwill, Acquired During Period			4	192
Adjustments			1
Goodwill impairment	$ (16)	$ (59)	(75)	(47)
Goodwill ending balance	956		956	1,026
Ingalls [Member]
Goodwill [Roll Forward]
Goodwill beginning balance			175	175
Goodwill ending balance	175		175	175
Newport News Shipbuilding [Member]
Goodwill [Roll Forward]
Goodwill beginning balance			748	706
Goodwill, Acquired During Period			4	42
Goodwill ending balance	752		752	748
Other [Member]
Goodwill [Roll Forward]
Goodwill beginning balance			103
Goodwill, Acquired During Period				150
Adjustments			1
Goodwill impairment	(16)	$ (59)	(75)	(47)
Goodwill ending balance	$ 29		$ 29	$ 103

Other Intangible Assets (Narrat

Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)	$ 27
Aggregate weighted-average amortization period		40 years
Aggregate amortization expense		$ 26	$ 28	$ 20
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,016	21	21
2,017	21	21
2,018	21	21
2,019	20	20
2,020	20	20
UniversalPegasus International [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets			$ 41
Aggregate weighted-average amortization period			11 years
The S.M. Stoller Corporation [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets			$ 6
Aggregate weighted-average amortization period			5 years
Undersea Solutions Group [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1	1
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 27
Aggregate weighted-average amortization period		7 years
Technology | UniversalPegasus International [Member]
Finite-Lived Intangible Assets [Line Items]
Aggregate weighted-average amortization period		19 years

Purchased Intangible Assets (Ta

Purchased Intangible Assets (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 987	$ 986
Impairment	(27)
Accumulated amortization	(465)	(439)
Net carrying amount	$ 495	$ 547

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2011
Income Tax Disclosure [Abstract]
Effective income tax rate	36.10%	33.30%	33.80%
Threshhold for payment obligation resulting from tax liability related to spin off	$ 5
Unrecognized Tax Benefits	27	$ 19	$ 11	$ 19	$ 4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	17	11
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		3
Decrease in Unrecognized Tax Benefits is Reasonably Possible	2
Reimbursement Receivable Net of Federal Benefit, Resulting From Spin-off					$ 4
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions			$ 14
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	22
Deferred Tax Assets, Tax Credit Carryforwards	14
Tax Credit Carryforward, Valuation Allowance	9
Operating Loss Carryforwards	39
Deferred Tax Assets, Operating Loss Carryforwards	2
Operating Loss Carryforwards, Valuation Allowance	2
UniversalPegasus International [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 2
New Accounting Pronouncement, Early Adoption, Effect [Member]
Operating Loss Carryforwards [Line Items]
Long-term deferred tax assets		$ (129)

Federal Income Tax Expense (Tab

Federal Income Tax Expense (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal income taxes currently payable	$ 242	$ 191	$ 150
Change in deferred federal income taxes	(14)	(22)	(17)
Total federal income taxes	$ 228	$ 169	$ 133

Reconciliation of Income Tax ex

Reconciliation of Income Tax expense to Federal Statutory Rate (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Federal Income Tax Reconciliation [Abstract]
Income tax expense (benefit) on operations at statutory rate	$ 221	$ 178	$ 138
Goodwill impairment	11	6
Manufacturing deduction	(10)	(9)	(7)
Research tax credit			(2)
Other, Net	6	(6)	4
Total federal income taxes	$ 228	$ 169	$ 133

Change in Unrecognized Tax Bene

Change in Unrecognized Tax Benefits (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of the year	$ 19	$ 11	$ 19
Additions based on tax positions related to the current year	8	5	5
Additions based on tax positions of prior years	3	3	1
Current year acquisitions		4
Reductions based on tax positions of prior years			(14)
Settlements	(1)
Statute of limitations expirations	(2)	(4)
Net change in unrecognized tax benefits	8	8	(8)
Unrecognized tax benefits at end of the year	$ 27	$ 19	$ 11

Net Deferred Tax Assets (Table)

Net Deferred Tax Assets (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets
Retirement benefits	$ 571	$ 592
Workers' compensation	263	256
Reserves not currently deductible for tax purposes	21	9
Stock-based compensation	19	14
Net operating losses and tax credit carry-forwards	17	20
Other	12	9
Gross deferred tax asset	903	900
Less valuation allowance	11	14
Net deferred tax assets	892	886
Deferred Tax Liabilities
Depreciation and amortization	310	297
Contract accounting differences	85	53
Purchased intangibles	161	195
Gross deferred tax liabilities	556	545
Total net deferred tax assets	$ 336	$ 341

Schedule of Long-term Debt (Tab

Schedule of Long-term Debt (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Nov. 30, 2015	Dec. 31, 2014	Dec. 02, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,273		$ 1,670
Less unamortized debt issuance costs	(32)		(30)		$ (35)
Less current portion			108
Long-term debt, net of current portion	1,273		1,562
Senior notes due December 15, 2021, 5.000%
Debt Instrument [Line Items]
Stated percentage				5.00%
Senior notes due November 15, 2025, 5.000%
Debt Instrument [Line Items]
Stated percentage		5.00%
Term Loan | Term loan due March 30, 2016
Debt Instrument [Line Items]
Long-term debt			395
Senior Note
Debt Instrument [Line Items]
Less unamortized debt issuance costs	(22)		(20)
Senior Note | Senior notes due March 15, 2021, 7.125%
Debt Instrument [Line Items]
Long-term debt			$ 600
Stated percentage			7.125%
Senior Note | Senior notes due December 15, 2021, 5.000%
Debt Instrument [Line Items]
Long-term debt	$ 600		$ 600
Stated percentage	5.00%		5.00%
Senior Note | Senior notes due November 15, 2025, 5.000%
Debt Instrument [Line Items]
Long-term debt	$ 600
Stated percentage	5.00%
Bonds | Mississippi economic development revenue bonds due May 1, 2024, 7.81%
Debt Instrument [Line Items]
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%
Debt Instrument [Line Items]
Long-term debt	$ 21		$ 21
Stated percentage	4.55%		4.55%

Debt Credity Facility (Narrativ

Debt Credity Facility (Narrative) (Details) - USD ($) $ in Millions	Jul. 13, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Credit Facility
Debt issuance costs		$ 32	$ 30	$ 35
Revolving Credit Facility | Second Amended and Restated Credit Agreement
Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,250
Line of credit term (in years)	5 years
Revolving Credit Facility | Second Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR) [Member] | Minimum
Credit Facility
Spread on variable rate (LIBOR)		1.25%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | London Interbank Offered Rate (LIBOR) [Member] | Maximum
Credit Facility
Spread on variable rate (LIBOR)		2.00%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Base Rate [Member]
Credit Facility
Fee rate on unutilized balance		0.25%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Base Rate [Member] | Minimum
Credit Facility
Fee rate on unutilized balance		0.25%
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Base Rate [Member] | Maximum
Credit Facility
Fee rate on unutilized balance		0.35%
Revolving Credit Facility | HII Credit Facility
Credit Facility
Revolving Credit Facility balance unutilized		$ 1,223
Debt issuance costs		10	10
Letter of Credit | Second Amended and Restated Credit Agreement
Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity		500
Standby Letters of Credit | HII Credit Facility
Credit Facility
Letters of credit issued but undrawn		27
Senior Notes
Credit Facility
Debt issuance costs		22	$ 20
Loans Payable [Member] | Term Loan Due March 30, 2016
Credit Facility
Repayments of Debt		$ 345

Debt Senior Note (Narrative) (D

Debt Senior Note (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Nov. 30, 2015	Dec. 02, 2014	Dec. 31, 2013	Mar. 11, 2011
Debt Instrument [Line Items]
Loss on early extinguishment of debt	$ 44,000,000	$ 37,000,000
Debt issuance costs	32,000,000	30,000,000			$ 35,000,000
Unregistered Senior Notes Due March 15, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage						6.875%
Extinguishment of Debt, Amount	600,000,000
Unregistered Senior Notes Due March 15, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						7.125%
Extinguishment of Debt, Amount	600,000,000
Senior notes due December 15, 2021, 5.000%
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage				5.00%
Senior notes due November 15, 2025, 5.000%
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage			5.00%
Senior Notes
Debt Instrument [Line Items]
Debt issuance costs	$ 22,000,000	$ 20,000,000
Senior Notes | Senior notes due December 15, 2021, 5.000%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%	5.00%
Senior Notes | Senior notes due November 15, 2025, 5.000%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%

Debt Schedule of Extinguishment

Debt Schedule of Extinguishment of Debt (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Extinguishment of Debt [Line Items]
Redemption and tender premiums and fees	$ 33	$ 31
Write off of unamortized debt issuance costs	11	6
Loss on early extinguishment of debt	$ 44	$ 37

Debt Revenue Bond (Narrative) (

Debt Revenue Bond (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt	$ 1,273	$ 1,670
Long-term Debt, Fair Value	1,343	1,779
Bonds | Mississippi economic development revenue bonds due May 1, 2024, 7.81%
Debt Instrument [Line Items]
Long-term debt	$ 84	$ 84
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	7.81%	7.81%
Bonds | Gulf opportunity zone industrial development revenue bonds due December 1, 2028, 4.55%
Debt Instrument [Line Items]
Long-term debt	$ 21	$ 21
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	4.55%	4.55%

Investigations, Claims, And L79

Investigations, Claims, And Litigation (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)frigates
False Claims Act | Minimum
Loss Contingencies
Monetary damages	$ 835
Bolivarian Republic of Venezuela [Member]
Loss Contingencies
Monetary damages	$ 61
Number of foreign-built frigates | frigates	2
Arbitration Claim	$ 173
Ingalls Timecharging Investigation [Member]
Loss Contingencies
Contract receivable retainage initially withheld	24
Estimate of misallocated costs and overstated progress	4
United States Navy | Ingalls Timecharging Investigation [Member]
Loss Contingencies
Contract receivable retainage initially withheld	18.2
Contract receivable retainage	4.7
Customer estimate of misallocated costs and overstated progress	3.1
United States Coast Guard | Ingalls Timecharging Investigation [Member]
Loss Contingencies
Contract receivable retainage initially withheld	5.8
Contract receivable retainage	$ 3.6

Commitments and Contingencies80

Commitments and Contingencies (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Commitments and Contingencies
Probable future cost for envionmental remediation	$ 2
Entity Number of Employees	36,000
Operating lease rent expense	$ 62	$ 53	$ 46
Percent of workforce subject to collective bargaining arrangements
Commitments and Contingencies
Collective bargaining agreements	.50
Number of collective bargaining agreements
Commitments and Contingencies
Collective bargaining agreements	8
Number of collective bargaining agreements at Newport News
Commitments and Contingencies
Collective bargaining agreements	3
Number of collective bargaining agreements at Pascagoula and Gulfport
Commitments and Contingencies
Collective bargaining agreements	5
Surety Bonds Outstanding
Commitments and Contingencies
Surety bonds outstanding	$ 356
HII Credit Facility | Standby Letters of Credit
Commitments and Contingencies
Letters of credit issued but undrawn	$ 27
Minimum
Commitments and Contingencies
Period covered by collective bargaining agreements	3 years
Maximum
Commitments and Contingencies
Period covered by collective bargaining agreements	5 years
Hanford Site, Richland, Washington
Commitments and Contingencies
Entity Number of Employees	35

Commitments and Contingencies M

Commitments and Contingencies Minimum Rental commitments Under Long-Term Non-Cancellable Operating Leases (Table) (Details) $ in Millions	Dec. 31, 2015USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,016	$ 35
2,017	30
2,018	27
2,019	23
2,020	19
Thereafter	63
Total	$ 197

Impacts From Huricanes (Narrati

Impacts From Huricanes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2013
Business Interruption Loss
Insurance recoveries			$ 677.5
Proceeds from legal settlements		$ 150
Hurricane Insurance Related Matters, Effect on Operating Income	$ 136	136	(116)
Gain (loss) related to litigation settlement		$ 150
Reduction in operating income	$ (14)
Factory Mutual Insurance Company
Business Interruption Loss
Insurance recoveries			180
Impact to operating income from insurance recoveries			180
Factory Mutual Insurance Company | Recovery of lost profits
Business Interruption Loss
Impact to operating income from insurance recoveries			$ 64

Employee Pension and Other Po83

Employee Pension and Other Postretirement Benefits Employee Pension and Other Postretirement Benefits Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Cost recognized for defined contribution plans			$ 73	$ 70	$ 61
Pension and other postretirement benefit plan liabilities			146	142
Defined Contribution Plan, Liabilities			27	26
Aggregate accumulated benefit obligation for plans with accumulated benefit obligations in excess of plan assets			4,051	3,981
Aggregate fair value of plan assets for plans with accumulated benefit obligations in excess of plan assets			$ 3,391	$ 3,438
Initial health care cost trend rate assumed for next year			7.00%	7.00%
Gradually declining to a rate of			5.00%	5.00%
Plan amendments	$ (177)	$ 30
Assets held in rabbi trusts			$ 74	$ 45
Derivative [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			1	1
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation			5,635	5,671	4,730
Accumulated benefit obligation			5,273	5,244
Fair value of plan assets			4,613	4,731	4,310
Aggregate projected benefit obligation for plans with projected benefit obligations in excess of plan assets			5,635	4,394
Aggregate fair value of plan assets for plans with projected benefit obligations in excess of plan assets			4,613	3,438
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year			167
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation			$ 566	$ 650	$ 616
Initial health care cost trend rate assumed for next year			7.00%	7.00%
Gradually declining to a rate of			5.00%	5.00%	5.00%
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year			$ 37
Maximum
Defined Benefit Plan Disclosure [Line Items]
Maximum annual percentage employer contribution per employee			4.00%
Non-qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets held in rabbi trusts			$ 47	$ 43
Qualified [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation			5,490	5,529
Accumulated benefit obligation			5,146	5,124
Fair value of plan assets			$ 4,613	$ 4,731

Employee Pension and Other Po84

Employee Pension and Other Postretirement Benefits Schedule of Net Benefit Costs (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 150	$ 136	$ 147
Interest cost	242	253	215
Expected return on plan assets	(351)	(322)	(289)
Amortization of prior service cost (credit)	19	19	18
Amortization of net actuarial loss (gain)	86	52	118
Curtailments			(1)
Net periodic benefit cost	146	138	208
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	13	13	21
Interest cost	27	30	33
Amortization of prior service cost (credit)	(20)	(26)	(21)
Amortization of net actuarial loss (gain)	2		16
Net periodic benefit cost	$ 22	$ 17	$ 49

Employee Pension and Other Po85

Employee Pension and Other Postretirement Benefits Schedule of Defined Benefit Plans Discolsures (Table) (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Plan amendments		$ (177)	$ 30
Pension Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year				$ 5,671	$ 4,730
Service cost				150	136	$ 147
Interest cost				242	253	215
Plan participants' contributions				11	26
Actuarial loss (gain)				(254)	714
Benefits paid				(185)	(168)
Curtailments					(20)
Benefit obligation at end of year				5,635	5,671	4,730
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year				4,731	4,310
Actual return on plan assets				(47)	437
Employer contributions				103	126
Plan participants' contributions				11	26
Benefits paid				(185)	(168)
Fair value of plan assets at end of year				4,613	4,731	4,310
Funded status				(1,022)	(940)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Pension plan assets					17
Current liability	[1]			(21)	(18)
Non-current liability	[2]			(1,001)	(939)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Prior service costs (credits)				86	105
Net actuarial loss (gain)				1,433	1,374
Other Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year				650	616
Service cost				13	13	21
Interest cost				27	30	33
Plan participants' contributions				6	7
Actuarial loss (gain)				(91)	24
Benefits paid				(39)	(40)
Benefit obligation at end of year				566	650	$ 616
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions				33	33
Plan participants' contributions				6	7
Benefits paid				(39)	(40)
Funded status				(566)	(650)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liability	[1]			(143)	(143)
Non-current liability	[2]			(423)	(507)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Prior service costs (credits)				(105)	(125)
Net actuarial loss (gain)				$ (21)	$ 73
[1]	Included in other current liabilities and current portion of postretirement plan liabilities, respectively.
[2]	Included in pension plan liabilities and other postretirement plan liabilities, respectively.

Employee Pension and Other Po86

Employee Pension and Other Postretirement Benefits Schedule of Amounts in AOCI to be Recongnized (Table) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax [Abstract]
Amortization of prior service cost (credit)	[1]	$ 1	$ 7	$ 3
Amortization of net actuarial loss (gain)	[1]	88	52	134
Pension Benefits [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax [Abstract]
Prior service cost (credit)				(66)
Amortization of prior service cost (credit)		19	19	18
Net actuarial loss (gain)		(144)	(599)	716
Amortization of net actuarial loss (gain)		86	52	118
Other		(1)	20	12
Total changes in accumulated other comprehensive income (loss)		(40)	(508)	798
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)		18
Net loss		84
Total		102
Other Benefits [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax [Abstract]
Prior service cost (credit)				145
Amortization of prior service cost (credit)		(20)	(26)	(21)
Net actuarial loss (gain)		91	(24)	220
Amortization of net actuarial loss (gain)		2		16
Other		1		1
Total changes in accumulated other comprehensive income (loss)		74	$ (50)	$ 361
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)		(19)
Net loss		(5)
Total		$ (24)
[1]	These accumulated comprehensive income (loss) components are included in the computation of net periodic benefit cost. See Note 18: Employee Pension and Other Postretirement Benefits. The tax expense associated with amounts reclassified from accumulated other comprehensive income (loss) for the years ended December 31, 2015, 2014, and 2013, was $30 million, $16 million, and $46 million, respectively.

Employee Pension and Other Po87

Employee Pension and Other Postretirement Benefits Schedule of Assumpstions Used and Health Care Cost Trend Rates (Table) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted Average Assumptions - Net Periodic Benefit Cost [Abstract]
Gradually declining to a rate of	5.00%	5.00%
Weighted Average Assumptions - Benefit Obligation [Abstract]
Initial health care cost trend rate assumed for next year	7.00%	7.00%
Gradually declining to a rate of	5.00%	5.00%
Pension Benefits [Member]
Weighted Average Assumptions - Net Periodic Benefit Cost [Abstract]
Discount rate	4.34%	5.27%	4.27%
Expected long-term rate on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	3.64%	3.69%	3.66%
Weighted Average Assumptions - Benefit Obligation [Abstract]
Discount rate	4.73%	4.34%
Rate of compensation increase	3.66%	3.64%
Other Benefits [Member]
Weighted Average Assumptions - Net Periodic Benefit Cost [Abstract]
Discount rate	4.22%	5.03%	4.02%
Initial health care cost trend rate assumed for next year	7.00%	7.33%	7.67%
Gradually declining to a rate of	5.00%	5.00%	5.00%
Weighted Average Assumptions - Benefit Obligation [Abstract]
Discount rate	4.58%	4.22%
Initial health care cost trend rate assumed for next year	7.00%	7.00%
Gradually declining to a rate of	5.00%	5.00%	5.00%

Employee Pension and Other Po88

Employee Pension and Other Postretirement Benefits Schedule of Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates (Table) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect on postretirement benefit expense - Increase	$ 2
Effect on postretirement benefit expense - Decrease	2
Effect on postretirement benefit obligations - Increase	22
Effect on postretirement benefit obligations - Decrease	$ 20

Employee Pension and Other Po89

Employee Pension and Other Postretirement Benefits Schedule of Defined Benefit Plans Disclosures, Cash Contributions (Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Other benefit plans	$ 33	$ 33	$ 38
Total contributions	136	159	343
Discretionary Contribution [Member] | Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension contributions	99	123	301
Discretionary Contribution [Member] | Non-qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension contributions	$ 4	$ 3	$ 4

Employee Pension and Other Po90

Employee Pension and Other Postretirement Benefits Schedule of Expected Benefit Payments and Receipts (Table) (Details) $ in Millions	Dec. 31, 2015USD ($)
Pension Benefits [Member]
Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2,016	$ 204
2,017	217
2,018	231
2,019	246
2,020	263
Years 2021 to 2025	1,617
Other Benefits [Member]
Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2,016	37
2,017	38
2,018	40
2,019	41
2,020	42
Years 2021 to 2025	214
Prescription Drug Subsidy Receipts, Fiscal Year Maturity [Abstract]
Years 2021 to 2025	$ 2

Employee Pension and Other Po91

Employee Pension and Other Postretirement Benefits Schedule of Allocation Plan Asset (Table) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1,062	$ 1,071
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,954	3,115
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		597	545	$ 445
Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 4,613	4,731
U.S. equities
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocations		20.00%
Maximum target allocations		42.00%
U.S. equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 460	467
U.S. equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	932	956
U.S. equities | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 1,392	1,423
International equities
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocations		15.00%
Maximum target allocations		33.00%
International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 597	599
International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	477	483
International equities | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 1,074	1,082
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocations		25.00%
Maximum target allocations		50.00%
Alternative Investments
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocations		5.00%
Maximum target allocations		15.00%
U.S. government | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 175	237
U.S. government | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		175	237
U.S. agency | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		171	174
U.S. agency | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		171	174
Non-U.S. government | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		70	88
Non-U.S. government | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		70	88
Investment grade debt | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	1,008	1,041
Investment grade debt | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	1,008	1,041
Asset backed | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		39	52
Asset backed | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		39	52
Non-investment grade debt | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	40	45
Non-investment grade debt | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	40	45
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	5	5
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	40	37
Cash and cash equivalents | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	45	42
Hedge funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		312	298	257
Hedge funds | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		312	298
Real estate fund | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		285	247	$ 188
Real estate fund | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		285	247
Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2	2
Other | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 2	$ 2
[1]	U.S. and international equity securities include investments in small, medium, and large capitalization stocks of public companies held in separately managed accounts or commingled trust funds.
[2]	Investment grade fixed income securities include corporate bonds rated Baa3/BBB- or higher by one or more rating agencies.
[3]	(3) Non-investment grade fixed income securities include corporate bonds consistently rated below Baa3/BBB- by one or more rating agencies and units of a high yield commingled fund.
[4]	Cash and cash equivalents are highly liquid short-term investment funds and include net receivables and payables of the trust. These funds are available for immediate use to fund daily operations, execute investment policies, and serve as a temporary investment vehicle. The Company's plan asset allocation policy does not include cash.

Employee Pension and Other Po92

Employee Pension and Other Postretirement Benefits Schedule of Level 3 Defined Benfit Plan Assets Rollforward (Table) (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 545	$ 445
Return on plan assets, Attributable to Assets Held	52	43
Purchases		57
Fair value of plan assets at end of year	597	545
Hedge funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	298	257
Return on plan assets, Attributable to Assets Held	14	19
Purchases		22
Fair value of plan assets at end of year	312	298
Real estate fund
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	247	188
Return on plan assets, Attributable to Assets Held	38	24
Purchases		35
Fair value of plan assets at end of year	$ 285	$ 247

Stock Compensation Plans Stock

Stock Compensation Plans Stock Compensation Plans (Narrative) (Details) - $ / shares	Mar. 31, 2011	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years
Restricted performance stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation, Arrangement By Share-Based Payment, Stock Awards, Performance Goals, EBITDAP Weight		50.00%		50.00%
Share-Based Compensation, Arrangement By Share-Based Payment, Stock Awards, Performance Goals, Return on Invested Capital Weight		50.00%		50.00%
Restricted performance stock rights | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted performance stock rights ultimate vesting percentage		0.00%		0.00%
Restricted performance stock rights | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted performance stock rights ultimate vesting percentage		200.00%		200.00%
Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 75.73		$ 75.73	$ 51.23	$ 40.92	$ 39.92
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				865,000	1,510,000	931,000
Share-based Compensation Arrangement by Share-based Payment Award Equity Instruments Other Than Options Transferred From Employees for Minimum Tax Obligations				400,000	600,000	300,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted				163,000	246,000	456,000
Stock Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		10,000
2012 Long Term Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		3,400,000		3,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		4,300,000		4,300,000
2012 Long Term Incentive Stock Plan [Member] | Restricted performance stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				200,000	200,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 142.02		$ 142.02	$ 98.22
2012 Long Term Incentive Stock Plan [Member] | Restricted stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				3,000	12,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 115.50		$ 115.50	$ 101.21
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			1 year		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		10,000		10,000
2011 Long Term Incentive Stock Plan [Member] | Restricted performance stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						400,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value						$ 44.67
2011 Long Term Incentive Stock Plan [Member] | Restricted stock rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	700,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 41.50
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number					600,000

Stock Compensation Plans Schedu

Stock Compensation Plans Schedule of Status of Stock Awards (Table) (Details) - Stock Awards - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Stock awards, Outstanding, Beginning balance	1,311	1,673	1,901
Stock Awards, Granted	163	246	456
Stock awards, Adjustment due to performance	315	918	315
Stock awards, Vested	(865)	(1,510)	(931)
Stock awards, Forfeited	(33)	(16)	(68)
Stock awards, Outstanding, Ending balance	891	1,311	1,673	1,901
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Stock awards, Outstanding, Weighted Average Grant Date Fair Value, Beginning balance	$ 51.23	$ 40.92	$ 39.92
Stock awards, Granted, Weighted Average Grant Date Fair Value	140.48	98.33	46.51
Stock Awards, Adjustments due to performance, Weighted Average Grant Date Fair Value	36.36	41.45	41.41
Stock awards, Vested, Weighted Average Grant Date Fair Value	36.36	41.45	41.41
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	83.44	45.19	40.23
Stock awards, Outstanding, Weighted Average Grant Date Fair Value, Ending balance	$ 75.73	$ 51.23	$ 40.92	$ 39.92
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	7 months	8 months	1 year	1 year 5 months

Stock Compensation Plans Stoc95

Stock Compensation Plans Stock Options (Narrative) (Details) shares in Thousands, $ in Millions	Mar. 31, 2011shares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares	Dec. 31, 2012USD ($)shares	Mar. 30, 2011USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive stock plan conversion factor determined in spin-off agreement						1.65
Stock options, Outstanding		533	644	819	1,166
Stock options, Outstanding, Intrinsic Value | $		$ 50	$ 49	$ 45	$ 12
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $		$ 11	$ 12	$ 11
Stock Options | 2011 Long Term Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issued, number after conversion	1,600
Options fully vested at time of conversion, number						1,400
Stock options, Outstanding, Intrinsic Value | $						$ 15
Stock Options | Granted Prior to 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, Outstanding						1,000
Vesting rate		.25
Vesting period		4 years
Number of years until expiration		10 years
Stock Options | Granted after 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate		.33
Vesting period		3 years
Number of years until expiration		7 years

Stock Compensation Plans Sche96

Stock Compensation Plans Schedule of Status of Stock Options (Table) (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options, Outstanding, Beginning balance	644	819	1,166
Stock options, Exercised	(111)	(174)	(346)
Stock options, Canceled and Forfeited		(1)	(1)
Stock options, Outstanding, Ending balance	533	644	819	1,166
Stock options, Vested	533
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Stock options, Outstanding, Weighted Average Exercise Price, Beginning balance	$ 36.06	$ 35.01	$ 34.67
Stock options, Exercised, Weighted Average Exercise Price	46.46	31.11	29.66
Stock options, Canceled and Forfeited, Weighted Average Exercise Price		31.76	28.51
Stock options, Outstanding, Weighted Average Exercise Price, Ending balance	33.90	$ 36.06	$ 35.01	$ 34.67
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price	$ 33.90
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Stock options, Weighted Average Remaining Contractual Term	7 months	1 year 5 months	2 years 1 month	2 years 7 months
Stock Options, Vested, Weighted Average Remaining Contractual Term	7 months
Stock options, Outstanding, Intrinsic Value	$ 50	$ 49	$ 45	$ 12
Stock options, Vested, Intrinsic Value	$ 50

Stock Compensation Plans Compen

Stock Compensation Plans Compensation and Unrecognized Compensation Expense (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation expense
Total stock-based compensation expense	$ 43	$ 34	$ 44
Tax benefits recognized for stock-based compensation	17	13	17
Stock Awards
Compensation expense
Realized tax benefits from issuance of stock in settlement of RPSRs and RSRs	41	53	32
Stock Options
Compensation expense
Total stock-based compensation expense			0
Realized tax benefits from exercise of stock options	4	$ 5	$ 4
Restricted stock rights
Unrecognized compensation expense
Unrecognized compensation expense associated with stock awards	$ 1
Weighted average period of recognition of unrecognized compensation expense	1 year
Restricted performance stock rights
Unrecognized compensation expense
Unrecognized compensation expense associated with stock awards	$ 25
Weighted average period of recognition of unrecognized compensation expense	7 months

Unaudited Selected Quarterly 98

Unaudited Selected Quarterly Data (Table) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended											12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015		Mar. 31, 2015	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]
Sales and service revenues	$ 1,905		$ 1,800	$ 1,745		$ 1,570	$ 1,927		$ 1,717	$ 1,719	$ 1,594	$ 7,020	$ 6,957	$ 6,820
Operating income (loss)	144	[1]	200	269	[2]	156	144	[3]	171	181	159	769	655	512
Earnings (loss) before income taxes	80	[1]	175	244	[2]	133	79	[3]	144	152	132	632	507	394
Net earnings (loss)	$ 50	[1]	$ 111	$ 156	[2]	$ 87	$ 52	[3]	$ 96	$ 100	$ 90	$ 404	$ 338	$ 261
Dividends declared per share	$ 0.50		$ 0.40	$ 0.40		$ 0.40	$ 0.40		$ 0.20	$ 0.20	$ 0.20	$ 1.70	$ 1	$ 0.50
Basic earnings (loss) per share	1.07	[1]	2.31	3.22	[2]	1.80	1.07	[3]	1.97	2.05	1.83	8.43	6.93	5.25
Diluted earnings (loss) per share	$ 1.06	[1]	$ 2.29	$ 3.20	[2]	$ 1.79	$ 1.05	[3]	$ 1.96	$ 2.04	$ 1.81	$ 8.36	$ 6.86	$ 5.18
Goodwill Impairment	$ 16			$ 59								$ 75	$ 47
Impairment of Intangible Assets (Excluding Goodwill)	$ 27
Hurricane Insurance Related Matters, Effect on Operating Income				$ 136								$ 136		$ (116)
[1]	In the fourth quarter of 2015, the Company recorded $16 million goodwill impairment and $27 million intangible asset impairment charges.
[2]	In the second quarter of 2015, the Company recorded a $59 million goodwill impairment charge. During the same period, the Company recorded $136 million of operating income as a result of the Aon settlement.
[3]	In the fourth quarter of 2014, the Company recorded a $47 million goodwill impairment charge.

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowances beginning balance	$ 14	$ 12	$ 21
(Benefits)/Charges to Income	(3)	2	(9)
Valuation allowances ending balance	$ 11	$ 14	$ 12