Shareholders' Equity Accelerated Share Repurchase (Details) shares in Millions, $ in Millions	12 Months Ended
Jan. 30, 2016 USD ($) shares
Equity [Abstract]
Accelerated Share Repurchase Price (low end of the range)	$ 150
Accelerated Share Repurchase Price (high end of the range)	$ 175
Stock Repurchased and Retired at ASR Settlement, Shares \| shares	1.6
Prepaid repurchase of common stock	$ 55
Stock Repurchased and Retired During Period, Value	120
Accelerated Share Repurchases, Cash or Stock Settlement	165
Accelerated Share Repurchases, Description of Adjustment to Initial Price Paid	$ 10

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration