Treasury Stock Repurchases (Details) (USD $) In Billions, except Share data in Millions	0 Months Ended	12 Months Ended
Mar. 03, 2011	Jan. 11, 2011	Dec. 07, 2010	Nov. 18, 2010	Jan. 29, 2011	Jan. 30, 2010	Nov. 17, 2010 Morgan Stanley & Co [Member]	Nov. 17, 2010 Share Repurchase Program [Member]
Accelerated share repurchase, value							$ 1.0
Share repurchase, authorized value								$ 2.5
Stock repurchased during the period, shares	0.9	1.5	3.8	12.6	18.8

Number of shares that have been repurchased during the period and are being held in treasury.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

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
-Article 5

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration