SHAREHOLDERS' EQUITY AND EARNINGS PER SHARE 4 (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2008 Collared Accelerated Share Acquisition Program, April 2008 [Member]	Dec. 31, 2011 Collared Accelerated Share Acquisition Program, September 2010 [Member]	Dec. 31, 2010 Collared Accelerated Share Acquisition Program, September 2010 [Member]
Accelerated Share Repurchases [Line Items]
Accelerated Share Repurchases, Settlement Payment or Receipt	$ 1,000		$ 500
Accelerated Share Repurchases, Shares Received	18,416,241	9,574,435
Accelerated Share Repurchases, Final Price Paid Per Share	$ 54.30	$ 52.22
Accelerated Share Repurchases, Initial Share Delivery			5,670,006
Accelerated Share Repurchases, Interim Share Delivery		1,496,435	2,407,994

Amount of cash payment to or cash receipt from the bank; or the stock issuance to or stock received from the bank in the settlement of the accelerated share repurchase agreement.

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 99-7

-Paragraph 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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