Revisions to Previously Issued Financial Statements - Schedule of Nature of Adjustments, Applicable Segment, Amount of Increase (or Decrease) to Sales and Operating Income, Period Recorded and Correct Period (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended						6 Months Ended	12 Months Ended			42 Months Ended	3 Months Ended														6 Months Ended	12 Months Ended			42 Months Ended	3 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013	Jun. 27, 2014 Aerospace Systems [Member]	Mar. 28, 2014 Aerospace Systems [Member]	Dec. 31, 2013 Aerospace Systems [Member]	Sep. 27, 2013 Aerospace Systems [Member]	Jun. 28, 2013 Aerospace Systems [Member]	Mar. 29, 2013 Aerospace Systems [Member]	Jun. 27, 2014 Aerospace Systems [Member]	Dec. 31, 2013 Aerospace Systems [Member]	Dec. 31, 2012 Aerospace Systems [Member]	Dec. 31, 2011 Aerospace Systems [Member]	Jun. 27, 2014 Aerospace Systems [Member]	Dec. 31, 2013 Out of Period Amounts [Member]	Sep. 27, 2013 Out of Period Amounts [Member]	Jun. 28, 2013 Out of Period Amounts [Member]	Mar. 29, 2013 Out of Period Amounts [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Communication Systems [Member] Higher Development and Material Costs for Networked Communications Systems [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Communication Systems [Member] Higher Development and Material Costs for Networked Communications Systems [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Communication Systems [Member] Higher Development and Material Costs for Networked Communications Systems [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Communication Systems [Member] Higher Development and Material Costs for Networked Communications Systems [Member]	Jun. 27, 2014 Out of Period Amounts [Member] Aerospace Systems [Member]	Mar. 28, 2014 Out of Period Amounts [Member] Aerospace Systems [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member]	Jun. 27, 2014 Out of Period Amounts [Member] Aerospace Systems [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member]	Dec. 31, 2012 Out of Period Amounts [Member] Aerospace Systems [Member]	Dec. 31, 2011 Out of Period Amounts [Member] Aerospace Systems [Member]	Jun. 27, 2014 Out of Period Amounts [Member] Aerospace Systems [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Sub-Contractor Subscription Deposit [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Sub-Contractor Subscription Deposit [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Sub-Contractor Subscription Deposit [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Sub-Contractor Subscription Deposit [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Costs Accruals for Goods/Services Received [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Costs Accruals for Goods/Services Received [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Costs Accruals for Goods/Services Received [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Costs Accruals for Goods/Services Received [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Unrecorded Liabilities [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Unrecorded Liabilities [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Unrecorded Liabilities [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Unrecorded Liabilities [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Accrued Vacation [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Accrued Vacation [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Accrued Vacation [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Accrued Vacation [Member]	Dec. 31, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Overstated Revenue [Member]	Sep. 27, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Overstated Revenue [Member]	Jun. 28, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Overstated Revenue [Member]	Mar. 29, 2013 Out of Period Amounts [Member] Aerospace Systems [Member] Overstated Revenue [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Sales	$ 2,940	$ 3,002	$ 8,916	$ 9,388	$ (10)	$ (13)	$ (21)	$ 5	$ (3)	$ 12	$ (23)	$ (7)	$ (38)	$ (4)	$ (73)	$ 9	$ 3	$ 7	$ 20				$ 10			$ 9	$ 3	$ 7	$ 20		$ 39	$ (36)	$ (3)		$ 5	$ 7	$ 7	$ 7				$ 5				$ (2)					$ 4	$ (4)
Operating income	$ 257	$ 306	$ 782	$ 906												$ 6	$ (1)	$ (1)	$ 10				$ 10													$ 1	$ 1	$ 1				$ 1					$ 6	$ (2)	$ (2)	$ (2)