Dispositions and Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2012 Business	Jun. 28, 2013	Jun. 29, 2012 Engility [Member]	Jun. 29, 2012 Engility [Member]	Dec. 31, 2012 Kollmorgen Electro-Optical [Member]
Acquisitions And Discontinued Operations [Line Items]
Transaction expenses in connection with the spin-off, before income taxes				$ 13
Transaction expenses in connection with the spin-off, after income taxes				10
Interest expense for debt			7	13
Aggregate purchase price of acquisition					349
Amount of goodwill recognized	7,744	7,702			250
Goodwill deductible for income tax purposes					$ 149
Number of businesses acquired	3