Property and Leases - Schedule of assets and liabilities related to operating and finance leases (Details) - USD ($) $ in Millions	Aug. 02, 2020	Feb. 02, 2020
Assets
Operating lease assets	$ 5,436	$ 5,595
Finance lease assets	1,940	934
Total lease assets	7,376	6,529
Current:
Operating lease liabilities	831	828
Finance lease liabilities	128	84
Long-term:
Operating lease liabilities	4,895	5,066
Finance lease liabilities	2,056	1,081
Total lease liabilities	7,910	7,059
Finance lease asset accumulated amortization	$ 707	$ 644