For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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Period Type:	duration

Summary of Significant Accounting Policies - Sales by Product (Details)	12 Months Ended
	Mar. 03, 2018	Mar. 04, 2017	Feb. 27, 2016
Fiscal Year
Length of reporting period	364 days	371 days	364 days
Prescription drugs \| Pharmacy sales \| Retail Pharmacy
Product Class
Percentage of sales	65.90%	66.00%	66.90%
Over-the-counter medications and personal care \| Pharmacy sales \| Retail Pharmacy
Product Class
Percentage of sales	10.90%
Health and beauty aids \| Pharmacy sales \| Retail Pharmacy
Product Class
Percentage of sales	4.40%
General merchandise and other \| Pharmacy sales \| Retail Pharmacy
Product Class
Percentage of sales	18.80%