Summary of Significant Accounting Policies - Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Accounting Policies [Abstract]
Percentage of Commissions on Sale of Extended Warranties to Revenue	2.00%	2.00%	2.20%
Profit Share on Sale of Extended Warranties	$ 10	$ 68	$ 133
Gift Card Redeemability, Determination Period	90.00%
Revenue Recognition, Milestone Method, Revenue Recognized	$ 34	$ 40	$ 37
Period of Expiration for Customer Loyalty Certificates, Low End of Range	2 months
Period of Expiration for Customer Loyalty Certificates, High End of Range	12 months