Postretirement Benefits (Components Of SERP Expense Recognized In The Consolidated Statements Of Earnings) (Details) - Components of SERP expense [Member] - USD ($) $ in Millions	12 Months Ended
	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Postretirement Benefits Disclosure [Line Items]
Participant service cost	$ 2	$ 2	$ 3
Interest cost	7	7	7
Amortization of net loss and other	1	5	3
Total SERP expense	$ 10	$ 14	$ 13