Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Stockholders' Equity (Dividends) (Details) - $ / shares		1 Months Ended												3 Months Ended								12 Months Ended
Stockholders' Equity (Dividends) (Details) - $ / shares	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Mar. 31, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May 31, 2014	Feb. 28, 2014	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Class of Stock [Line Items]
Cash dividends declared per share (in dollars per share)		$ 0.1350	$ 0.1350	$ 0.1350	$ 0.1350	$ 0.1175	$ 0.1175	$ 0.1175	$ 0.1175	$ 0.1000	$ 0.1000	$ 0.1000	$ 0.1000	$ 0.1350	$ 0.1350	$ 0.1350	$ 0.1350	$ 0.1175	$ 0.1175	$ 0.1175	$ 0.1175	$ 0.54	$ 0.470	$ 0.400
Subsequent Event [Member]
Class of Stock [Line Items]
Cash dividends declared per share (in dollars per share)	$ 0.1600