Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	Aug. 03, 2019	Feb. 03, 2019 USD ($)
Number of states in which entity operates	43
Increase of Net Right of Use Asset		$ 2,519
Increase in Net Lease Liability		2,728
Cumulative Effect of New Accounting Principle, Before Tax Impact, in Period of Adoption		209
Cumulative Effect of New Accounting Principle, Tax Impact, in Period of Adoption		$ 54