Inventories (Detail) (USD $) In Millions, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Inventory [Line Items]
Work-in-process, primarily related to long-term contracts and programs in progress	$ 7,365	$ 7,073
Less: customer advances and progress payments	(4,968)	(4,834)
Inventory for long term contracts or programs net of customer advances and progress payments	2,397	2,239
Other inventories	501	738
Total inventories, net	$ 2,898	$ 2,977