v2.4.0.6
Condensed Statements of Cash Flows (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash Flows from Operating Activities      
Net Income $ 928 $ 864 $ 454
Adjustments to reconcile net income to net cash provided by operating activities:      
Provision for deferred income taxes 5 52 (51)
Other 26 9 (3)
Net change in:      
Receivables from brokers, dealers, and clearing organizations (104) 220 148
Other securities owned (43) (231) 581
Other assets 10 (15) 133
Accrued expenses and other liabilities (237) (183) 289
Net cash provided by (used for) operating activities 1,266 2,464 (9)
Cash Flows from Investing Activities      
Other investing activities 3 7 5
Net cash used for investing activities (16,260) (8,667) (15,410)
Cash Flows from Financing Activities      
Issuance of commercial paper 300    
Issuance of long-term debt 350   701
Repayment of long-term debt (732) (116) (205)
Premium paid on debt exchange (19)    
Net proceeds from preferred stock offering 863    
Net proceeds from common stock offering     543
Dividends paid (337) (295) (288)
Proceeds from stock options exercised and other 35 96 35
Other financing activities (5) 2 (5)
Net cash provided by (used for) financing activities 18,978 9,951 12,109
Increase (Decrease) in Cash and Cash Equivalents 3,984 3,748 (3,310)
Cash and Cash Equivalents at Beginning of Year 8,679 4,931 8,241
Cash and Cash Equivalents at End of Year 12,663 8,679 4,931
Parent Company
      
Cash Flows from Operating Activities      
Net Income 928 864 454
Adjustments to reconcile net income to net cash provided by operating activities:      
Equity in undistributed earnings of subsidiaries (662) (591) (478)
Provision for deferred income taxes 9 3 3
Other 39 1 (3)
Net change in:      
Receivables from brokers, dealers, and clearing organizations     11
Other securities owned 3 6 422
Other assets (21) 26 40
Accrued expenses and other liabilities (5) (76) (2)
Net cash provided by (used for) operating activities 291 233 447
Cash Flows from Investing Activities      
Due from subsidiaries - net 43 24 63
Increase in investments in subsidiaries (307) (366) (1,025)
Other investing activities   8 4
Net cash used for investing activities (264) (334) (958)
Cash Flows from Financing Activities      
Issuance of commercial paper 300    
Issuance of long-term debt 350   701
Repayment of long-term debt (727)   (200)
Premium paid on debt exchange (19)    
Net proceeds from preferred stock offering 863    
Net proceeds from common stock offering     543
Dividends paid (337) (295) (288)
Proceeds from stock options exercised and other 35 96 35
Other financing activities (5) 3 (6)
Net cash provided by (used for) financing activities 460 (196) 785
Increase (Decrease) in Cash and Cash Equivalents 487 (297) 274
Cash and Cash Equivalents at Beginning of Year 852 1,149 875
Cash and Cash Equivalents at End of Year $ 1,339 $ 852 $ 1,149