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		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Interest rate swap derivative instruments [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	$ (8)	$ (15)	$ 45	$ (16)
Carrying Value Of Long Term Debt [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized	$ 8	$ 15	$ (45)	$ 16