Aggregate dividends declared during the period for each share of common stock outstanding.

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

+ References

No definition available.

+ Details

Name:	us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

+ Details

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_March2018RepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_February2016RepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_June2015RepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_November2012RepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_February2015RepurchaseProgramMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=lb_September2017RepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=lb_ThirdPartySourcingBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	2 Months Ended	3 Months Ended	12 Months Ended
	Mar. 22, 2018	May 02, 2015	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016	Mar. 08, 2018	Oct. 28, 2017	Apr. 29, 2017	Apr. 30, 2016	Aug. 01, 2015
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired			9,409	5,719	5,468
Repurchase of Common Stock			$ 445.0	$ 438.0	$ 483.0
Common Stock, Dividends, Per Share, Declared			$ 2.40	$ 4.40	$ 4.00
Proceeds from Sale of Equity Method Investments			$ 0.0	$ 0.0	$ 85.0
Equity Method Investment, Realized Gain (Loss) on Disposal			$ 0.0	$ 0.0	$ 78.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired	800
Repurchase of Common Stock	$ 35.0
Common Stock, Dividends, Per Share, Declared	$ 0.60
March 2018 Repurchase Program [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount						$ 250.0
February 2016 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount									$ 500.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount								$ 59.0
Treasury Stock, Shares, Acquired			51	5,719
Repurchase of Common Stock			$ 3.0	$ 438.0
June 2015 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount										$ 250.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount									$ 17.0
Treasury Stock, Shares, Acquired					2,680
Repurchase of Common Stock					$ 233.0
November 2012 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 91.0
February 2015 Repurchase Program [Member] [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount		250.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount										$ 0.6
Treasury Stock, Shares, Acquired					2,788
Repurchase of Common Stock					$ 250.0
September 2017 Repurchase Program [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount							$ 250.0
Treasury Stock, Shares, Acquired			3,858
Repurchase of Common Stock			$ 202.0
September 2017 Repurchase Program [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 23.0
Third Party Sourcing Business [Member]
Subsequent Event [Line Items]
Proceeds from Sale of Equity Method Investments		85.0
Equity Method Investment, Realized Gain (Loss) on Disposal		$ 78.0