Summary of Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date (Detail) - USD ($) $ in Millions		Sep. 25, 2016	Dec. 31, 2015	Nov. 06, 2015
Business Acquisition [Line Items]
Goodwill		$ 10,791	$ 10,695
Sikorsky Aircraft Corporation
Business Acquisition [Line Items]
Cash and cash equivalents				$ 75
Receivables, net				1,948
Inventories, net				1,605
Other current assets				25
Property, plant and equipment				649
Goodwill				2,853
Other noncurrent assets				507
Deferred income tax assets				265
Total identifiable assets and goodwill				12,018
Accounts payable				(565)
Customer advances and amounts in excess of costs incurred				(1,197)
Salaries, benefits and payroll taxes				(105)
Other current liabilities				(382)
Customer contractual obligations	[1]			(507)
Other noncurrent liabilities				(156)
Deferred income tax liabilities	[1]			(28)
Total liabilities assumed				(2,940)
Total purchase price				9,078
Sikorsky Aircraft Corporation | Customer Programs
Business Acquisition [Line Items]
Intangible assets				3,204
Sikorsky Aircraft Corporation | Trademarks
Business Acquisition [Line Items]
Intangible assets				$ 887

[1] Recorded in other noncurrent liabilities on the consolidated balance sheets. The refinements made during the quarter and nine months ended September 25, 2016 did not have a material effect on the acquired assets and liabilities assumed or on net earnings.