Leases (Other Information) (Details) $ in Millions	3 Months Ended
	May 04, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 201
Operating cash flows from finance leases	1
Financing cash flows from finance leases	4
Lease assets obtained in exchange for new lease liabilities:
Operating leases	147
Finance leases	$ 2
Weighted average remaining lease term:
Operating leases	5 years 4 months 24 days
Finance leases	5 years 3 months 18 days
Weighted average discount rate:
Operating leases	3.40%
Finance leases	4.40%