Derivative Instruments (Effects of Interest Rate Derivatives and Adjustments to LTD on Earnings) (Details) - Not Designated as Hedging Instrument [Member] - Interest Expense [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Interest rate swap derivative instruments [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	$ 55	$ 3	$ 53	$ (1)
Carrying Value Of Long Term Debt [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	$ (55)	$ (3)	$ (53)	$ 1