Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended	6 Months Ended
May 31, 2013	Jan. 31, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Jan. 31, 2012	Nov. 02, 2013	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012	Feb. 02, 2013
Accounting Policies [Abstract]
Fair value of cash and cash equivalents considered as Level 1 inputs								$ 550.6	$ 721.0	$ 550.6	$ 721.0	$ 646.8
Cash dividend date declared			2012-11	2012-08	2012-05	2012-01
Cash dividends declared per share (in dollars per share)	$ 0.17	$ 0.17	$ 0.14	$ 0.14	$ 0.14	$ 0.14	$ 0.17	$ 0.17	$ 0.14	$ 0.17	$ 0.14

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: 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

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- Definition

The month and year (YYYY-MM) that the dividend to be paid was declared.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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