Acquisitions and Divestitures - Additional Information (Detail) - USD ($)				2 Months Ended	3 Months Ended			12 Months Ended
	Aug. 24, 2016	Aug. 16, 2016	Nov. 06, 2015	Dec. 31, 2015	Dec. 31, 2016	Sep. 25, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014		Nov. 23, 2015
Acquisitions And Divestitures [Line Items]
Acquisitions of businesses and investments in affiliates									$ 9,003,000,000	$ 898,000,000
Proceeds from borrowings under revolving credit facilities									6,000,000,000
Proceeds from issuance of fixed interest-rate long-term notes									9,101,000,000
Aggregate amount of goodwill arising from acquisitions				$ 10,695,000,000	$ 10,764,000,000		$ 10,695,000,000	$ 10,764,000,000	10,695,000,000	7,964,000,000	[1]
Non-recoverable transaction costs									38,000,000
Income tax charge related to historic earnings of foreign subsidiaries				310,000,000	386,000,000		310,000,000	386,000,000	310,000,000	249,000,000
Amortization of intangible assets								284,000,000	68,000,000	20,000,000
Gain on step acquisition of AWE, net of tax								104,000,000
One-time special cash payment received from Abacus		$ 1,800,000,000						1,800,000,000
Net gain on divestiture of business segment								1,242,000,000
Fair value of shares of common stock tendered and retired								2,497,000,000
Severance charges								99,000,000	102,000,000
Net deferred tax (benefit)								(231,000,000)	(473,000,000)	(351,000,000)
Space Systems
Acquisitions And Divestitures [Line Items]
Aggregate amount of goodwill arising from acquisitions				1,588,000,000	1,585,000,000		1,588,000,000	1,585,000,000	1,588,000,000	1,590,000,000	[1]
November 2015 Notes
Acquisitions And Divestitures [Line Items]
Amount of issued debt												$ 7,000,000,000
Abacus | Term Loan Facilities
Acquisitions And Divestitures [Line Items]
Amount of issued debt		$ 1,840,000,000
Information Systems & Global Solutions
Acquisitions And Divestitures [Line Items]
Percentage of reduction in common stock outstanding		3.00%
Net gain on divestiture of business segment		$ 1,242,000,000
Fair value of shares of common stock tendered and retired		2,500,000,000
Net book value		3,000,000,000
Other adjustments		$ 100,000,000
Information Systems & Global Solutions | Lockheed Martin
Acquisitions And Divestitures [Line Items]
Number of common stock exchanged		9,369,694
Information Systems & Global Solutions | Discontinued Operations
Acquisitions And Divestitures [Line Items]
Severance charges								19,000,000	20,000,000
Information Systems & Global Solutions | Continuing Operations
Acquisitions And Divestitures [Line Items]
Pension costs								54,000,000	71,000,000	59,000,000
Information Systems & Global Solutions | Restatement Adjustment
Acquisitions And Divestitures [Line Items]
Corporate overhead costs								(82,000,000)	(165,000,000)	(169,000,000)
Lockheed Martin Commercial Flight Training | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Acquisitions And Divestitures [Line Items]
Asset impairment charges									90,000,000
Net deferred tax (benefit)									(80,000,000)
Reduction in net earnings									10,000,000
Sikorsky Aircraft Corporation
Acquisitions And Divestitures [Line Items]
Acquisitions of businesses and investments in affiliates			$ 9,000,000,000
Cash on hand			2,000,000,000
Proceeds from Issuance of Commercial Paper			$ 1,000,000,000
Repayment of commercial paper							1,000,000,000
Goodwill					78,000,000
Inventories					(185,000,000)
Acquired intangible assets, weighted average period of amortization			15 years
Customer contractual obligations			$ 507,000,000
Customer contractual obligations due in 2017					110,000,000			110,000,000
Customer contractual obligations due in 2018					70,000,000			70,000,000
Customer contractual obligations due in 2019					70,000,000			70,000,000
Customer contractual obligations due in 2020					60,000,000			60,000,000
Customer contractual obligations due in 2021					40,000,000			40,000,000
Customer contractual obligations due after 2021					27,000,000			27,000,000
Sales related to customer contractual obligations, to date					130,000,000			$ 130,000,000
Aggregate amount of goodwill arising from acquisitions			2,842,000,000
Net sales				400,000,000
Operating profit				(45,000,000)
Costs associated with issuance of fixed interest-rate long-term notes				48,000,000
Net liabilities			2,989,000,000
Sikorsky Aircraft Corporation | Three Hundred And Sixty Four Day Revolving Credit Facility And Five Year Revolving Credit Facility
Acquisitions And Divestitures [Line Items]
Proceeds from borrowings under revolving credit facilities			6,000,000,000
Non-recoverable transaction costs				38,000,000
Sikorsky Aircraft Corporation | November 2015 Notes
Acquisitions And Divestitures [Line Items]
Proceeds from issuance of fixed interest-rate long-term notes							7,000,000,000
Sikorsky Aircraft Corporation | Pro Forma Adjustment
Acquisitions And Divestitures [Line Items]
Pension curtailment loss									72,000,000
Income tax charge related to historic earnings of foreign subsidiaries				$ 58,000,000			$ 58,000,000		58,000,000
Amortization of intangible assets									125,000,000	150,000,000
Interest expense, debt									40,000,000	50,000,000
Sikorsky Aircraft Corporation | Unaudited Supplemental Pro Forma Financial Information
Acquisitions And Divestitures [Line Items]
Increase in interest expense, net of tax									$ 110,000,000	$ 120,000,000
Sikorsky Aircraft Corporation | Trademarks
Acquisitions And Divestitures [Line Items]
Intangible assets					71,000,000
Aggregate amount allocated to other intangibles arising from acquisitions			887,000,000
Sikorsky Aircraft Corporation | Customer Programs
Acquisitions And Divestitures [Line Items]
Intangible assets					57,000,000
Aggregate amount allocated to other intangibles arising from acquisitions			$ 3,184,000,000
AWE Management Limited
Acquisitions And Divestitures [Line Items]
Net sales					307,000,000	$ 103,000,000
Operating profit					$ 2,900,000	104,000,000
Ownership interest percentage acquired	18.00%
Noncontrolling Interest, Ownership Percentage by Parent	51.00%
Net liabilities	$ 32,000,000
Business combination, acquisition of less than 100 percent, noncontrolling interest, fair value	107,000,000
AWE Management Limited | Net Sales | Segment Concentration Risk | Space Systems
Acquisitions And Divestitures [Line Items]
Concentration percentage								100.00%
AWE Management Limited | Net Sales | Equity Method Investment Risk | Space Systems
Acquisitions And Divestitures [Line Items]
Concentration percentage								0.00%
AWE Management Limited | Operating profit | Segment Concentration Risk | Space Systems
Acquisitions And Divestitures [Line Items]
Concentration percentage								51.00%
AWE Management Limited | Net Earnings | Equity Method Investment Risk | Space Systems
Acquisitions And Divestitures [Line Items]
Concentration percentage								33.00%
AWE Management Limited | Other income, net
Acquisitions And Divestitures [Line Items]
Gain on step acquisition of AWE, net of tax						104,000,000
Pre tax gain on step acquisition of AWE						127,000,000
Tax on gain on step acquisition of AWE						$ 23,000,000
AWE Management Limited | Customer relationships
Acquisitions And Divestitures [Line Items]
Intangible assets	$ 243,000,000
Acquired finite-lived intangible assets are amortized	8 years
Zeta
Acquisitions And Divestitures [Line Items]
Acquired intangible assets, weighted average period of amortization										10 years
Aggregate amount of goodwill arising from acquisitions										$ 290,000,000
Aggregate amount allocated to other intangibles arising from acquisitions										100
Business Acquisitions
Acquisitions And Divestitures [Line Items]
Aggregate amount of goodwill arising from acquisitions										370,000,000
Aggregate amount allocated to other intangibles arising from acquisitions										$ 125,000,000

[1] Includes reclassifications of goodwill among our business segments as a result of our program realignment, which occurred during the fourth quarter of 2015 (see "Note 1 - Significant Accounting Policies").