Goodwill and Other Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2015	Mar. 01, 2014	Mar. 02, 2013
Goodwill and Other Intangible Assets
Goodwill impairment charges	$ 0us-gaap_GoodwillImpairmentLoss
Changes in the carrying amount of goodwill
Acquisitions	76,124us-gaap_GoodwillAcquiredDuringPeriod
Balance at end of period	76,124us-gaap_Goodwill
Finite-lived intangible assets
Gross Carrying Amount	2,093,531	1,987,377
Accumulated Amortization	(1,672,051)	(1,556,150)
Unfavorable lease intangibles	55,571us-gaap_BelowMarketLeaseNet	62,687us-gaap_BelowMarketLeaseNet
Amortization expense for intangible assets and liabilities	118,105us-gaap_AmortizationOfIntangibleAssets	119,138us-gaap_AmortizationOfIntangibleAssets	127,737us-gaap_AmortizationOfIntangibleAssets
Anticipated annual amortization expense for intangible assets and liabilities
2016	115,962
2017	102,571
2018	64,577
2019	38,579
2020	19,217
Favorable leases and other
Finite-lived intangible assets
Gross Carrying Amount	653,377	634,320
Accumulated Amortization	(481,041)	(447,608)
Remaining Weighted Average Amortization Period	8 years	9 years
Prescription files
Finite-lived intangible assets
Gross Carrying Amount	1,440,154	1,353,057
Accumulated Amortization	$ (1,191,010)	$ (1,108,542)
Remaining Weighted Average Amortization Period	3 years	4 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References