Other Liabilities - Additional Information (Detail) - New World Headquarters [Member] - USD ($) $ in Millions	Aug. 26, 2016	Feb. 29, 2016	Aug. 28, 2015
Schedule Of Other Liabilities [Line Items]
New World Headquarters construction costs to date	$ 117.7	$ 94.7	$ 57.4
Construction costs liability to lessor	$ 117.7	$ 94.7	$ 57.4

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Name:	us-gaap_ConstructionInProgressGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant