Annual report pursuant to Section 13 and 15(d)

Investment Securities - Equity Method Investments (Details)

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Investment Securities - Equity Method Investments (Details) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended 0 Months Ended 1 Months Ended
Dec. 31, 2010
Dec. 31, 2012
Japanese Brokerage Joint Venture
Nov. 15, 2010
BlackRock, Inc.
Jun. 30, 2011
BlackRock, Inc.
Nov. 16, 2012
BlackRock, Inc.
Schedule of Equity Method Investments [Line Items]          
Gain on sale of investment   $ 370,000,000 $ 90,000,000 $ 377,000,000  
Shares of BlackRock, Inc. sold     51.2    
Net proceeds from sale of BlackRock, Inc. shares     8,200,000,000    
Ownership percentage of BlackRock, Inc. before sale of shares     34.00%    
Ownership percentage of BlackRock, Inc. after sale of shares         7.00%
Summarized Financial Information, Income Statement [Abstract]          
Revenues 8,612,000,000 [1]        
Operating income 2,998,000,000 [1]        
Earnings before income taxes 3,021,000,000 [1]        
Net earnings $ 2,063,000,000 [1]        
[1] Consists of the results of BlackRock for the year ended December 31, 2010. BlackRock was accounted for under the equity method of accounting through November 15, 2010.