Investment Securities (Details Textual) - USD ($) $ in Millions	Aug. 31, 2019	Mar. 02, 2019
Debt Securities, Available-for-sale [Line Items]
Short term held-to-maturity securities	$ 0.0	$ 485.8
Auction Rate Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Long term available-for-sale investment securities	20.3	20.3
Valuation adjustments	$ 0.1	$ (0.4)

This element represents the temporary valuation adjustment related to available-for-sale investment securities which is recorded in accumulated other comprehensive (loss) income.

No definition available.

+ Details

Name:	bbby_AvailableForSaleDebtSecuritiesTemporaryImpairmentAdjustmentAccumulatedOtherComprehensiveIncomeLoss
Namespace Prefix:	bbby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amortized cost of long-term investments in debt and equity securities and other forms of securities that provide ownership interests classified as available-for-sale.

+ References

No definition available.

+ Details

Name:	bbby_AvailableforsaleSecuritiesLongTermInvestmentsAmortizedCost
Namespace Prefix:	bbby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt security measured at amortized cost (held-to-maturity), classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26626-111562

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AuctionRateSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: