Shareholders' Equity (Deficit) (Dividends Paid) (Details) - USD ($) $ / shares in Units, $ in Millions	2 Months Ended	3 Months Ended												12 Months Ended
	Mar. 21, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Common Stock, Dividends, Per Share, Cash Paid		$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 2.40	$ 2.40	$ 2.40
Special Dividend To Common Stockholders Per Share Paid		0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	2.00	0.00	0.00	2.00
Total Dividends Per Share Cash Paid		$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 0.60	$ 2.60	$ 2.40	$ 2.40	$ 4.40
Payments of Dividends		$ 166	$ 165	$ 167	$ 168	$ 170	$ 172	$ 172	$ 172	$ 172	$ 173	$ 173	$ 750	$ 666	$ 686	$ 1,268
Common Stock, Dividends, Per Share, Declared														$ 2.40	$ 2.40	$ 4.40
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.30