Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense and Effective Income Tax Rates
Schedule of Income Tax Expense and Effective Income Tax Rates [Table Text Block]
Schedule of Income Tax Expense and Effective Income Tax Rates [Table Text Block]
Equity [Abstract]
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note [Abstract]
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic and Diluted [Abstract]
Dilutive effect of of stock awards and options granted to employees under stock-based compensation plans
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Common stock dividends per share, declared (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Increase in quarterly common stock dividend (percent)
Increase (Decrease) in Stock Dividend, Percentage
Increase (Decrease) in Stock Dividend, Percentage
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Accounts receivable, net
Accounts Receivable, Net, Current
Unbilled receivables, net
Unbilled Receivables, Current
Inventoried costs, net
Inventory, Net
Prepaid expenses and other current assets
Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net of accumulated depreciation of $5,187 for 2018 and $5,066 for 2017
Property, Plant and Equipment, Net
Goodwill
Goodwill
Intangible Assets, net
Intangible Assets, Net (Excluding Goodwill)
Deferred tax assets
Deferred Tax Assets, Net, Noncurrent
Other non-current assets
Other Assets, Noncurrent
Total assets
Assets
Liabilities
Liabilities [Abstract]
Trade accounts payable
Accounts Payable, Current
Accrued employee compensation
Employee-related Liabilities, Current
Advance payments and amounts in excess of costs incurred
Customer Advances, Current
Other current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term debt, net of current portion of $744 for 2018 and $867 for 2017
Long-term Debt and Capital Lease Obligations
Pension and other post-retirement benefit plan liabilities
Liability, Defined Benefit Plan, Noncurrent
Other non-current liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies
Commitments and Contingencies
Shareholders’ equity
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, $1 par value; 10,000,000 shares authorized; no shares issued and outstanding
Preferred Stock, Value, Issued
Common stock, $1 par value; 800,000,000 shares authorized; issued and outstanding: 2018—174,254,250 and 2017—174,085,619
Common Stock, Value, Issued
Paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total shareholders’ equity
Stockholders' Equity Attributable to Parent
Total liabilities and shareholders’ equity
Liabilities and Equity
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Operating Segments [Member]
Operating Segments [Member]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Innovation Systems [Member]
Innovation Systems [Member]
Innovation Systems reporting segment
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Revenue, Net
Revenue, Net
Operating income
Operating Income (Loss)
Net earnings
Net Income (Loss) Attributable to Parent
Business Combination, Acquisition Related Costs
Business Combination, Acquisition Related Costs
Segment Reporting [Abstract]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Customer [Axis]
Customer [Axis]
Customer [Domain]
Customer [Domain]
US Government [Member]
US Government [Member]
US Government customers.
International Customer [Member]
International Customer [Member]
International Customer
Other Customers [Member]
Other Customers [Member]
US state and local government and US commercial customers.
Intersegment Eliminations [Member]
Intersegment Eliminations [Member]
Aerospace Systems [Member]
Aerospace Systems [Member]
Aerospace Systems reporting segment.
Mission Systems [Member]
Mission Systems [Member]
Mission Systems reporting segment.
Technology Services [Member]
Technology Services [Member]
Technology Services reporting segment.
Revenue, Major Customer [Line Items]
Revenue, Major Customer [Line Items]
Sales
Concentration Risk, Percentage
Concentration Risk, Percentage
Statement of Comprehensive Income [Abstract]
Sales
Revenue, Net [Abstract]
Product
Sales Revenue, Goods, Net
Service
Sales Revenue, Services, Net
Total sales
Operating costs and expenses
Cost of Goods and Services Sold [Abstract]
Product
Cost of Goods Sold
Service
Cost of Services
General and administrative expenses
General and Administrative Expense
Operating income
Other (expense) income
Other Nonoperating Income (Expense) [Abstract]
Interest expense
Interest and Debt Expense
Net FAS (non-service) Pension Benefit (Expense)
Net FAS (non-service) Pension Benefit (Expense)
Net FAS (non-service) Pension Benefit (Expense)
Other, net
Other Nonoperating Income (Expense)
Federal and foreign income tax expense
Income Tax Expense (Benefit)
Net earnings
Basic earnings per share
Earnings Per Share, Basic [Abstract]
Basic earnings per share
Earnings Per Share, Basic
Weighted-average common shares outstanding, in millions
Weighted Average Number of Shares Outstanding, Basic
Diluted earnings per share
Earnings Per Share, Diluted [Abstract]
Diluted earnings per share
Earnings Per Share, Diluted
Weighted-average diluted shares outstanding, in millions
Weighted Average Number of Shares Outstanding, Diluted
Net earnings (from above)
Change in unamortized benefit plan costs, net of tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Change in cumulative translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Other, net
Other Comprehensive Income (loss), other adjustment, net of tax
Other Comprehensive Income (loss), other adjustment, net of tax
Other comprehensive income, net of tax
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Commitments and Contingencies Disclosure [Abstract]
Environmental Remediation Obligations [Abstract]
Environmental Remediation Range of Future Costs [Table]
Environmental Remediation Range of Future Costs [Table]
Environmental Remediation Range of Future Costs, the amount accrued within the rang and the deferred costs expected to be recoverable through overhead charges on US Government contracts [Table]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Environmental Remediation Range of Future Costs [Line Items]
Environmental Remediation Range of Future Costs [Line Items]
[Line Items] for Environmental Remediation Range of Future Costs, the amount accrued within the range and the deferred costs expected to be recoverable through overhead charges on US Government contracts [Table]
Environmental Remediation [Table Text Block]
Environmental Remediation [Table Text Block]
Environmental Remediation Range of Possible Future Costs, Accrued Costs within that range and Deferred Cost expected to be recovered [Table Text Block]
Text Block [Abstract]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
2021 Maturity [Domain]
2021 Maturity [Domain]
2021 Maturity [Domain]
2023 Maturity [Domain]
2023 Maturity [Domain]
2023 Maturity [Domain]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Orbital ATK [Member]
Orbital ATK [Member]
Orbital ATK [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes [Member]
Senior Notes [Member]
Long-term Debt, Fair Value
Long-term Debt, Fair Value
Debt and Capital Lease Obligations
Debt and Capital Lease Obligations
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt
Debt Instrument, Interest Rate, Stated Percentage
Debt Instrument, Interest Rate, Stated Percentage
Accounting Changes and Error Corrections [Abstract]
Accounting Changes and Error Corrections [Text Block]
Accounting Changes and Error Corrections [Text Block]
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Long-term Debt, Current Maturities
Long-term Debt, Current Maturities
Preferred Stock, par value
Preferred Stock, Par or Stated Value Per Share
Preferred Stock, shares authorized
Preferred Stock, Shares Authorized
Preferred Stock, shares issued
Preferred Stock, Shares Issued
Preferred Stock, shares outstanding
Preferred Stock, Shares Outstanding
Common Stock, par value
Common Stock, Par or Stated Value Per Share
Common Stock, shares authorized
Common Stock, Shares Authorized
Common Stock, shares issued
Common Stock, Shares, Issued
Common Stock, shares outstanding
Common Stock, Shares, Outstanding
Fair Value Disclosures [Abstract]
Fair value information of assets and liabilities measured at fair value on a recurring basis
Fair Value, by Balance Sheet Grouping [Table Text Block]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK COMPENSATION PLANS AND OTHER COMPENSATION ARRANGEMENTS
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Disclosure Text Block Supplement [Abstract]
INVESTIGATIONS, CLAIMS AND LITIGATION
Legal Matters and Contingencies [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Goodwill [Line Items]
Goodwill [Line Items]
Beginning Balance
Acquisition of Orbital ATK
Goodwill, Acquired During Period
Other
Goodwill, Period Increase (Decrease)
Ending Balance
Environmental Matters
Environmental Contingency [Table]
Site Contingency [Table]
Loss Contingencies by Nature of Contingency [Axis]
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Environmental Issue [Member]
Environmental Issue [Member]
Maximum
Maximum [Member]
Minimum
Minimum [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other Current Liabilities [Member]
Other Current Liabilities [Member]
Other Noncurrent Liabilities [Member]
Other Noncurrent Liabilities [Member]
Other Current Assets [Member]
Other Current Assets [Member]
Other Noncurrent Assets [Member]
Other Noncurrent Assets [Member]
Site Contingency [Line Items]
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss
Loss Contingency, Estimate of Possible Loss
Accrual for Environmental Remediation Costs
Accrual for Environmental Loss Contingencies
Recorded Third-Party Environmental Recoveries, Amount
Recorded Third-Party Environmental Recoveries, Amount
Financial Arrangements
Other Commitments [Abstract]
Standby Unused Letters Of Credit and bank guarantees
Standby Unused Letters Of Credit and bank guarantees
Financial instruments issued by a bank, on behalf of the company and in favor of a beneficiary, which substitutes the company's credit worthiness with that of the bank. Letters of Credit are usually issued in conformance with a set of governing rules.
Surety Bond Outstanding
Surety Bond Outstanding
Surety Bond Outstanding
Operating leases
Leases, Operating [Abstract]
Rental expense for operating leases, net of immaterial amounts of sublease rental income
Operating Leases, Rent Expense
Line of Credit Facility
Line of Credit Facility [Abstract]
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Short-term Debt, Type [Domain]
Commercial Paper [Member]
Commercial Paper [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
London Interbank Offered Rate (LIBOR) [Member]
London Interbank Offered Rate (LIBOR) [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Two Year Term [Member] [Domain]
Two Year Term [Member] [Domain]
Two Year Term [Member] [Domain]
Five Year Term [Member] [Domain]
Five Year Term [Member] [Domain]
Five Year Term [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity
Line of Credit Facility, Maximum Borrowing Capacity
Debt Instrument, Covenant Compliance
Debt Instrument, Covenant Compliance
Short Term Debt, Maximum Borrowing Capacity
Short Term Debt, Maximum Borrowing Capacity
Short Term Debt, Maximum Borrowing Capacity
Debt Instrument, Term
Debt Instrument, Term
Line of Credit Outstanding
Long-term Line of Credit
Line of Credit Facility, Interest Rate During Period
Line of Credit Facility, Interest Rate During Period
Commercial Paper
Short-term Debt
Short-term Debt, Weighted Average Interest Rate, at Point in Time
Short-term Debt, Weighted Average Interest Rate, at Point in Time
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Customer Contracts [Member]
Customer Contracts [Member]
Customer Relationships [Member]
Customer Relationships [Member]
Business Combination, Below Market Contracts, reduction in sales for 2018
Business Combination, Below Market Contracts, reduction in sales for 2018
Business Combination, Below Market Contracts, reduction in sales next 12 months
Business Combination, Below Market Contracts, reduction in sales for 2019
Business Combination, Below Market Contracts, reduction in sales for 2019
Business Combination, Below Market Contracts, reduction in sales for 2019
Business Combination, Below Market Contracts, reduction in sales for 2020
Business Combination, Below Market Contracts, reduction in sales for 2020
Business Combination, Below Market Contracts, reduction in sales for 2020
Business Combination, Below Market Contracts, reduction in sales for 2021
Business Combination, Below Market Contracts, reduction in sales for 2021
Business Combination, Below Market Contracts, reduction in sales for 2021
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Net FAS (service)/CAS pension adjustment [Member]
Net FAS (service)/CAS pension adjustment [Member]
Net FAS (service)/CAS pension adjustment [Member]
Corporate, Non-Segment [Member]
Corporate, Non-Segment [Member]
Segment Reconciling Items [Member]
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of reportable segments
Number of Reportable Segments
Operating income
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2014-09 [Member]
Accounting Standards Update 2014-09 [Member]
Accounting Standards Update 2017-07 [Domain]
Accounting Standards Update 2017-07 [Domain]
Accounting Standards Update 2017-07 Compensation Retirement Benefits (Topic 715)
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Previously Reported [Member]
Scenario, Previously Reported [Member]
Restatement Adjustment [Member]
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest and Debt Expense
Earnings Per Share, Basic
Weighted Average Number of Shares Outstanding, Basic
Earnings Per Share, Diluted
Weighted Average Number of Shares Outstanding, Diluted
Other, net
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Accounting Standards Update 2018-02 and 2016-01 [Member]
Accounting Standards Update 2018-02 [Member]
Accounting Standards Update 2018-02 Income Statement - Reporting Comprehensive Income (Topic 220)
Statement, Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common stock
Common Stock [Member]
Paid-in capital
Additional Paid-in Capital [Member]
Retained earnings
Retained Earnings [Member]
Accumulated other comprehensive loss
AOCI Attributable to Parent [Member]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning of year
Impact from adoption of ASU 2018-02 and ASU 2016-01
Impact from adoption of ASU 2018-02 and ASU 2016-01
Accounting Standards Update 2018-02 Income Statement - Reprting Comprehensive Income (Topic 220) and 2016-01 Financial Statements (Topic 825)
Common stock repurchased
Stock Repurchased and Retired During Period, Value
Dividends declared
Dividends, Common Stock
Stock compensation
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Other comprehensive income, net of tax
End of period
Cash dividends declared per share
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Change in Accounting Estimate [Table Text Block]
Schedule of Change in Accounting Estimate [Table Text Block]
Contract with Customer, Asset and Liability [Table Text Block]
Contract with Customer, Asset and Liability [Table Text Block]
Accumulated Other Comprehensive Loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Loss Contingencies [Table]
Loss Contingencies [Table]
Updated claim [Member]
Updated claim [Member]
Updated claim [Member] - Updated claim related to a litigation matter.
Claim Amount [Axis]
Claim Amount [Axis]
Claim Amount [Axis] - Defines movements in claim amounts from litigation matters.
Claim Amount [Domain]
Claim Amount [Domain]
[Domain] for Claim Amount [Axis] - Defines movements in claim amounts from litigation matters.
Initial Claim [Member]
Initial Claim [Member]
Initial Claim [Member] - Amount of initial claim in a litigation matter.
Incremental claim [Member]
Incremental claim [Member]
Incremental claim [Member] - Incremental claim related to a litigation matter.
United States Postal Service
United States Postal Service [Member]
United States Postal Service [Member]
Solystic Matter [Member]
Solystic Matter [Member]
Solystic Matter [Member]
Gain Contingencies by Nature [Axis]
Gain Contingencies, Nature [Axis]
Gain Contingency, Nature [Domain]
Gain Contingency, Nature [Domain]
Unpaid Portions of Contract Price and Direct Costs Incurred [Member]
Unpaid Portions of Contract Price and Direct Costs Incurred [Member]
Unpaid Portions of Contract Price and Direct Costs Incurred [Member]
Acts and Omissions with Adverse Affects on Performance and Obligations [Member]
Acts and Omissions with Adverse Affects on Performance and Obligations [Member]
Acts and Omissions with Adverse Affects on Performance and Obligations [Member]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
False Claims Act
False Claims Act [Member]
False Claims Act [Member]
Litigation Status [Axis]
Litigation Status [Axis]
Litigation Status [Domain]
Litigation Status [Domain]
Threatened Litigation
Threatened Litigation [Member]
Loss Contingencies
Loss Contingencies [Line Items]
Contract award
Contract Award
Total Contract Award
Gain contingency, unrecorded amount
Gain Contingency, Unrecorded Amount
Loss Contingency, Damages Sought, Value
Loss Contingency, Damages Sought, Value
Counterclaim
Counterclaim
Counterclaim for damages sought
Loss Contingency, Number of Additional Defendants
Loss Contingency, Number of Defendants
Business Combination Disclosure [Text Block]
Business Combination Disclosure [Text Block]
Goodwill, Impaired, Accumulated Impairment Loss
Goodwill, Impaired, Accumulated Impairment Loss
Amortization of Intangible Assets
Amortization of Intangible Assets
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable Securities
Marketable Securities
Derivatives
Derivative Assets (Liabilities), at Fair Value, Net
FAIR VALUE OF FINANCIAL INSTRUMENTS
Fair Value Disclosures [Text Block]
Document and Entity Information [Abstract]
Document and Entity Information.
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Period End Date
Document Period End Date
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Entity Current Reporting Status
Entity Current Reporting Status
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
United States
UNITED STATES
Asia/Pacific
Asia Pacific [Member]
All other (principally Europe and Middle East)
All Other - Geographic Region [Domain]
All Other - Geographic Region [Domain]
Revenue, Geographic Location [Line Items]
Revenues from External Customers and Long-Lived Assets [Line Items]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements or Change in Accounting Principles [Table]
Accounting Standards Update 2018-02 [Member]
Accounting Standards Update 2016-01 [Member]
Accounting Standards Update 2016-01 [Member]
Pro Forma Adjustments, Additional depreciation expense, net of removal of historical depreciation
Pro Forma Adjustments, Additional depreciation expense, net of removal of historical depreciation
Pro Forma Adjustments, Additional depreciation expense, net of removal of historical depreciation
Unamortized benefit plan costs, net of tax benefit of $1,940 for 2018 and $3,056 for 2017
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
Cumulative Effect Of New Accounting Principle In Period Of Adoption
Cumulative Effect of New Accounting Principle in Period of Adoption
Tax Cuts and Job Act, Income Tax Expense (Benefit)
Tax Cuts and Job Act, Income Tax Expense (Benefit)
Tax Cuts and Job Act, Income Tax Expense (Benefit)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Other, net
Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax And Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax
The accumulated appreciation or loss, net of tax, in value of the total of unsold securities at the end of an accounting period and the accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses.
Total accumulated other comprehensive loss
Unamortized benefit plan costs - Tax Benefit (expense)
Unamortized benefit plan costs - Tax Benefit (expense)
Amount of tax benefit (expense) related to the ending balance of unamortized benefit plan costs in accumulated other comprehensive income.
Unamortized benefit plan costs, net actuarial losses, after-tax
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax
Unamortized benefit plan costs, reclassified from other comprehensive income to net earnings
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax
EARNINGS PER SHARE, SHARE REPURCHASES AND DIVIDENDS ON COMMON STOCK
Stockholders' Equity Note Disclosure [Text Block]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Ownership [Axis]
Ownership [Axis]
Ownership [Domain]
Ownership [Domain]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Cash and cash equivalents
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Accounts receivable, net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Unbilled receivables, net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Unbilled Receivables
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Unbilled Receivables
Inventoried costs, net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
Other current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Property, plant, and equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Goodwill
Intangible assets
Deferred tax assets
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets
Other non-current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Total assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Trade accounts payable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
Accrued employee compensation
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Employee-related liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Employee-related liabilities
Advance payments and amounts in excess of costs incurred
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Customer Advances
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Customer Advances
Below market contracts
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Below Market Contracts
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Below Market Contracts
Other current liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Long-term debt
Pension and other post-retirement benefit plan liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, NonCurrent Liabilities, Defined Benefit Plan Liability
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, NonCurrent Liabilities, Defined Benefit Plan Liability
Other non-current liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Total liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Total purchase price
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Shares of Orbital ATK common stock outstanding as of the Merger date
Shares, Outstanding
Cash consideration per share of Orbital ATK common stock
Business Acquisition, Share Price
Total purchase price
Business Combination, Consideration Transferred
BASIS OF PRESENTATION
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
Nonvested Restricted Stock Shares Activity [Table Text Block]
Schedule of Nonvested Share Activity [Table Text Block]
Cash Units and Cash Performance Units Aggregate Payout Amount [Table Text Block]
Cash Units and Cash Performance Units Aggregate Payout Amount [Table Text Block]
[Table Text Block] for Cash Units and Cash Performance Units Aggregate Payout Amount [Table]
Schedule of Error Corrections and Prior Period Adjustment Restatement [Table]
Schedule of Error Corrections and Prior Period Adjustment Restatement [Table]
Adjustments for Error Corrections [Axis]
Adjustments for Error Corrections [Axis]
Adjustments for Error Correction [Domain]
Adjustments for Error Correction [Domain]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Pro forma sales
Business Acquisition, Pro Forma Revenue
Pro forma net earnings
Business Acquisition, Pro Forma Net Income (Loss)
Pro forma basic earnings per share
Business Acquisition, Pro Forma Earnings Per Share, Basic
Pro forma diluted earnings per share
Business Acquisition, Pro Forma Earnings Per Share, Diluted
Pro Forma Adjustments, Orbital ATK ASC606 Sales adjustment
Pro Forma Adjustments, Orbital ATK ASC606 Sales adjustment
Pro Forma Adjustments, Orbital ATK ASC606 Sales adjustment
Pro Forma Adjustments, Orbital ATK ASC606 Cost of Sales adjustment
Pro Forma Adjustments, Orbital ATK ASC606 Cost of Sales adjustment
Pro Forma Adjustments, Orbital ATK ASC606 Cost of Sales adjustment
Pro Forma Adjustments, Orbital ATK intercompany sales elimination
Pro Forma Adjustments, Orbital ATK intercompany sales elimination
Pro Forma Adjustments, Orbital ATK intercompany sales elimination
Pro Forma Adjustments, Orbital ATK intercompany cost of sales elimination
Pro Forma Adjustments, Orbital ATK intercompany cost of sales elimination
Pro Forma Adjustments, Orbital ATK intercompany cost of sales elimination
Pro Forma Adjustments, Elimination of nonrecurring transaction costs
Pro Forma Adjustments, Elimination of nonrecurring transaction costs
Business combination, transaction costs
Pro Forma Adjustments, Additional interest expense due to debt issued to finance merger
Pro Forma Adjustments, Additional interest expense due to debt issued to finance merger
Pro Forma Adjustments, Additional interest expense due to debt issued to finance merger
Pro Forma Adjustments, Additional amortization expense, net of removal of historical amortization expense
Pro Forma Adjustments, Additional amortization expense, net of removal of historical amortization expense
Pro Forma Adjustments, Additional amortization expense, net of removal of historical amortization expense
Pro Forma Adjustments, Elimination of Orbital ATK’s amortization on net actuarial losses and prior service costs and pension/post-retirement costs
Pro Forma Adjustments, Elimination of Orbital ATK’s historical amortization of net actuarial losses and prior service credits and revised pension and other post-retirement costs
Pro Forma Adjustments, Elimination of Orbital ATK’s historical amortization of net actuarial losses and prior service credits and revised pension and other post-retirement costs
Accounting Changes and Error Correction [Abstract]
Schedule of Change in Accounting Estimate [Table]
Schedule of Change in Accounting Estimate [Table]
Change in Accounting Estimate by Type [Axis]
Change in Accounting Estimate by Type [Axis]
Change in Accounting Estimate, Type [Domain]
Change in Accounting Estimate, Type [Domain]
Contracts Accounted for under Percentage of Completion [Member]
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period
Contract with Customer, Performance Obligation Satisfied in Previous Period
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Business Acquisition, Pro Forma Information [Table Text Block]
Business Acquisition, Pro Forma Information [Table Text Block]
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan, Interest on Service Cost is reclassified to Interest Cost [Member]
Defined Benefit Plan, Interest on Service Cost is reclassified to Interest Cost [Member]
Defined Benefit Plan, Interest on Service Cost is reclassified to Interest Cost [Member]
Defined Benefit Plan, Administrative Expenses of the Service Cost reclassified to Net Actuarial Loss [Member]
Defined Benefit Plan, Administrative Expenses of the Service Cost reclassified to Net Actuarial Loss [Member]
Defined Benefit Plan, Administrative Expenses of the Service Cost reclassified to Net Actuarial Loss [Member]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension Benefits
Pension Plan [Member]
Medical and Life Benefits
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Prior Period Reclassification Adjustment
Prior Period Reclassification Adjustment
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Prior service credit
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Net loss from previous years
Defined Benefit Plan, Amortization of Gain (Loss)
Net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Defined benefit plan, contributions by Employer
Defined Benefit Plan, Plan Assets, Contributions by Employer
Defined Contribution Plan [Abstract]
Defined Contribution Plan [Abstract]
Defined contribution plan, employer contributions
Defined Contribution Plan, Employer Discretionary Contribution Amount
Cash and cash equivalents
Property, plant and equipment, net of accumulated depreciation of $5,066 for 2017
Long-term debt, net of current portion of $867 for 2017
Pension and other post-retirement benefit plan liabilities
Commitments and Contingencies
Common stock, $1 par value; 800,000,000 shares authorized; issues and outstanding: 2017 - 174,085,619
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Text Block]
Reconciliation of Revenue from Segments to Consolidated [Table]
Reconciliation of Revenue from Segments to Consolidated [Table]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Domain]
Contract with Customer, Basis of Pricing [Domain]
Cost-type [Member]
Time-and-materials Contract [Member]
Fixed-price [Member]
Fixed-price Contract [Member]
Revenue, Contract Type [Line Items]
Segment Reporting, Revenue Reconciling Item [Line Items]
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Share Repurchases
Class of Treasury Stock [Table Text Block]
Statement of Cash Flows [Abstract]
Operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Operating Activities
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile to net cash (used in) provided by operating activities:
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Stock-based compensation
Share-based Compensation
Deferred income taxes
Deferred Income Taxes and Tax Credits
Changes in assets and liabilities:
Increase (Decrease) in Operating Assets [Abstract]
Accounts receivable, net
Increase (Decrease) in Accounts Receivable
Unbilled receivables, net
Increase (Decrease) in Unbilled Receivables
Inventoried costs, net
Increase (Decrease) in Inventories
Prepaid expenses and other assets
Increase (Decrease) in Prepaid Expense and Other Assets
Accounts payable and other liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Income taxes payable
Increase (Decrease) in Income Taxes Payable
Retiree benefits
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits
Other, net
Other Noncash Income (Expense)
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Acquisition of Orbital ATK, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Capital expenditures
Payments to Acquire Property, Plant, and Equipment
Other, net
Payments for (Proceeds from) Other Investing Activities
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments of long-term debt
Repayments of Long-term Debt
Payments to credit facilities
Repayments of Lines of Credit
Net borrowings on commercial paper
Proceeds from (Repayments of) Commercial Paper
Common stock repurchases
Payments for Repurchase of Common Stock
Cash dividends paid
Payments of Ordinary Dividends, Common Stock
Payments of employee taxes withheld from share-based awards
Payments Related to Tax Withholding for Share-based Compensation
Other, net
Proceeds from (Payments for) Other Financing Activities
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Decrease in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents, beginning of year
Cash and cash equivalents, end of period
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Fiscal Period Policy
Fiscal Period, Policy [Policy Text Block]
Accounting Estimates
Use of Estimates, Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Long-term Contracts [Policy Text Block]
Description of New Accounting Pronouncements Not yet Adopted
Description of New Accounting Pronouncements Not yet Adopted [Text Block]
Pension and Other Postretirement Plans
Pension and Other Postretirement Plans, Policy [Policy Text Block]
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Investments in Marketable Securities
Marketable Securities, Policy [Policy Text Block]
Derivative Financial Instruments and Hedging Activities
Derivatives, Policy [Policy Text Block]
Goodwill and Intangible Assets, Policy [Policy Text Block]
Goodwill and Intangible Assets, Policy [Policy Text Block]
Fair Value of Long-term Debt
Fair Value of Financial Instruments, Policy [Policy Text Block]
U.S. Government Cost Claims
Government Contractors, Contracts in Progress, Policy [Policy Text Block]
Environmental Matters
Environmental Costs, Policy [Policy Text Block]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Schedule of Share Repurchases, by Program [Table]
Class of Treasury Stock [Table]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
September 2015 Share Repurchase Program Original Authorization
September 2015 Share Repurchase Original Authorization [Member]
September 2015 Share Repurchase Original Authorization [Member]
Share Repurchase [Line Items]
Equity, Class of Treasury Stock [Line Items]
Amount Authorized
Stock Repurchase Program, Authorized Amount
Shares Retired
Treasury Stock, Shares, Retired
Average Cost Per Share
Treasury Stock Acquired, Average Cost Per Share
Shares Repurchased
Stock Repurchased and Retired During Period, Shares
Share Repurchases - Notes to Table
Share Repurchases Table Abstract
Share Repuchase Table Footnotes, detail tags
Shares repurchased amount
Treasury Stock, Value, Acquired, Par Value Method
Amount remaining under authorization for share repurchases
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Change in Contract with Customer, Asset and Liability [Abstract]
Amount of increase (decrease) in Unbilled Receivables
Amount of increase (decrease) in Unbilled Receivables
Amount of increase (decrease) in Unbilled Receivables
Percent increase (decrease) in Unbilled Receivables
Percent increase (decrease) in Unbilled Receivables
Percent increase (decrease) in Unbilled Receivables
Advance payments and amounts in excess of costs incurred
Amount of decrease (increase) in Customer Advances
Amount of decrease (increase) in Customer Advances
Amount of decrease (increase) in Customer Advances
Percent decrease (increase) in Customer Advances
Percent decrease (increase) in Customer Advances
Percent decrease (increase) in Customer Advances
Net contract assets (liabilities)
Contract with Customer, Asset, Net, Current
Amount of increase (decrease) in net contract assets (liabilities)
Amount of increase (decrease) in net contract assets (liabilities)
Amount of increase (decrease) in net contract assets (liabilities)
Percent increase (decrease) in net contract assets (liabilities)
Percent increase (decrease) in net contract assets (liabilities)
Percent increase (decrease) in net contract assets (liabilities)
Innovation Systems net contract assets
Innovation Systems Net contract assets (liabilities)
Innovation Systems Net contract assets (liabilities)
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized
Contract with Customer, Liability, Revenue Recognized
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Copper [Member]
Copper [Member]
Copper [Member]
Zinc [Member] [Domain]
Zinc [Member] [Domain]
Zinc [Member] [Domain]
Foreign Exchange Forward [Member]
Foreign Exchange Forward [Member]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Cash Flow Hedging [Member]
Cash Flow Hedging [Member]
Derivative, Nonmonetary Notional Amount, Mass
Derivative, Nonmonetary Notional Amount, Mass
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Notional Amount
Derivative, Notional Amount
SEGMENT INFORMATION
Segment Reporting Disclosure [Text Block]
RETIREMENT BENEFITS
Pension and Other Postretirement Benefits Disclosure [Text Block]
INCOME TAXES
Income Tax Disclosure [Text Block]
Components of net periodic benefit cost
Schedule of Costs of Retirement Plans [Table Text Block]
Employer contributions to retirement plans
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Schedule of Goodwill
Schedule of Goodwill [Table Text Block]
Schedule of Purchased Intangible Assets
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
Expected Future Amortization of Purchased Intangibles
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
2018 (remainder of year)
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
2019
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2020
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, Increase in Research Tax Credits
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount
Income Tax Reconciliation, Deduction, Increase in Qualified Production Activity
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Scenario, Forecast [Member]
Scenario, Forecast [Member]
Maximum [Member]
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions
Tax Adjustments, Settlements, and Unusual Provisions
Decrease in Unrecognized Tax Benefits is Reasonably Possible
Decrease in Unrecognized Tax Benefits is Reasonably Possible
Unrecognized Tax Benefits, Increase Resulting from Acquisition
Unrecognized Tax Benefits, Increase Resulting from Acquisition
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Increase in Unrecognized Tax Benefits resulting from 2017 Tax Act is Reasonably Possible
Increase in Unrecognized Tax Benefits resulting from 2017 Tax Act is reasonably possible
Increase in Unrecognized Tax Benefits resulting from 2017 Tax Act is reasonably possible
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Equity Award [Domain]
Equity Award [Domain]
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units (RSUs) [Member]
Performance Shares [Member]
Performance Shares [Member]
Cash Units
Cash Units [Member]
Cash Units [Member]
Cash Performance Units
Cash Performance Units [Member]
Cash performance units.
Cash Units and Cash Performance Units
Cash Units and Cash Performance Units [Member]
Cash Units and Cash Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent
Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent
Shares granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value
Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value
Restricted Stock Rights and Restricted Performance Stock Rights Grant Date Aggregate Fair Value
Sales and operating income by segment
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]
Revenue by Major Customers by Reporting Segments
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Revenue from External Customers by Contract Type
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]
Revenue from External Customers by Geographic Areas
Revenue from External Customers by Geographic Areas [Table Text Block]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross customer-related and other intangible assets
Finite-Lived Intangible Assets, Gross
Less accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Net customer-related and other intangible assets
Finite-Lived Intangible Assets, Net
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation
Revenue, Remaining Performance Obligation
Innovation Systems Remaining Performance Obligations
Innovation Systems Remaining Performance Obligations
Innovation Systems Remaining Performance Obligations
Intercompany backlog eliminated at acquisition
Intercompany backlog eliminated at acquisition
Amount of Orbital ATK intercompany backlog eliminated at acquisition.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation