Number of shares that have been repurchased during the period and are being held in treasury.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Treasury stock (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 01, 2018	Feb. 23, 2019	Feb. 24, 2018	Feb. 25, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Repurchase of common stock	$ 25.8	$ 25.8	$ 0.0	$ 0.0
Common Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of shares repurchased (in shares) \| shares		1,772,018