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Revenue - Revenue by Product Line (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Revenue [Line Items]
Revenues	$ 7,441	$ 7,476
Aerospace
Revenue [Line Items]
Revenues	2,074	1,781
Aerospace | Aircraft Manufacturing, Outfitting and Completions
Revenue [Line Items]
Revenues	1,629	1,376
Aerospace | Aircraft Services
Revenue [Line Items]
Revenues	435	401
Aerospace | Pre-Owned Aircraft
Revenue [Line Items]
Revenues	10	4
Combat Systems
Revenue [Line Items]
Revenues	1,287	1,245
Combat Systems | Wheeled Combat Vehicles
Revenue [Line Items]
Revenues	560	563
Combat Systems | Weapons Systems and Munitions
Revenue [Line Items]
Revenues	346	341
Combat Systems | Tanks and Tracked Vehicles
Revenue [Line Items]
Revenues	247	192
Combat Systems | Engineering and Other Services
Revenue [Line Items]
Revenues	134	149
Information Systems and Technology
Revenue [Line Items]
Revenues	2,146	2,328
Information Systems and Technology | Information Technology Services
Revenue [Line Items]
Revenues	1,058	1,142
Information Systems and Technology | C4ISR Solutions
Revenue [Line Items]
Revenues	1,088	1,186
Marine Systems
Revenue [Line Items]
Revenues	1,934	2,122
Marine Systems | Nuclear - Powered Submarines
Revenue [Line Items]
Revenues	1,204	1,387
Marine Systems | Surface Combatants
Revenue [Line Items]
Revenues	247	273
Marine Systems | Auxiliary and Commercial Ships
Revenue [Line Items]
Revenues	143	149
Marine Systems | Repair and Other Services
Revenue [Line Items]
Revenues	$ 340	$ 313

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+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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