Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	9 Months Ended
Oct. 28, 2017 USD ($) stores
Net tax deficiencies from share based payment accounting \| $	$ 12
Number of states in which entity operates	45
Minimum [Member]
Number of Stores \| stores	860

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant