The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_GeneralAndAdministrativeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Segment Information - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 25, 2015 USD ($)	Sep. 23, 2016 Segment	Sep. 25, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment		3
NSS [Member]
Segment Reporting Information [Line Items]
Corporate expenses \| $	$ 4		$ 11