Derivative Instruments (Effects of Interest Rate Derivatives and Adjustments to LTD on Earnings) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended
May 04, 2019	May 05, 2018
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized
Interest rate swap derivative instruments [Member] \| Interest Expense [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	(2)	$ (5)
Carrying Value Of Long Term Debt [Member] \| Interest Expense [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	$ 2	$ 5

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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