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Consolidated Statements of Cash Flows (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 (used for) operating activities:      
Provision for loan losses 16 18 27
Net impairment losses on securities 32 [1] 31 [1] 36 [1]
Stock-based compensation 105 99 87
Depreciation and amortization 196 155 146
Provision (benefit) for deferred income taxes 5 52 (51)
Premium amortization, net, on securities available for sale and securities held to maturity 222 136 35
Other 26 9 (3)
Originations of loans held for sale (441) (1,574) (2,015)
Proceeds from sales of loans held for sale 513 1,703 1,943
Net change in:      
Cash and investments segregated and on deposit for regulatory purposes (2,549) (2,211) (4,376)
Receivables from brokers, dealers, and clearing organizations (104) 220 148
Receivables from brokerage clients (2,391) 341 (2,612)
Other securities owned (43) (231) 581
Other assets 10 (15) 133
Payables to brokers, dealers, and clearing organizations 28 (357) 283
Payables to brokerage clients 4,950 3,407 4,886
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      
Purchases of securities available for sale (29,035) (18,434) (15,697)
Proceeds from sales of securities available for sale 3,336 500 871
Principal payments on securities available for sale 13,867 7,978 13,261
Purchases of securities held to maturity (8,678) (2,253) (14,906)
Principal payments on securities held to maturity 5,453 4,786 2,672
Net increase in loans to banking clients (978) (1,125) (1,443)
Purchase of equipment, office facilities, and property (148) (180) (129)
Cash (paid) acquired in business acquisitions - net (80) 54 (44)
Other investing activities 3 7 5
Net cash used for investing activities (16,260) (8,667) (15,410)
Cash Flows from Financing Activities      
Net change in deposits from banking clients 18,523 10,264 11,328
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 offerings 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 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
Cash paid during the year for:      
Interest 143 168 178
Income taxes 508 517 327
Non-cash investing activities:      
Common stock issued and equity awards assumed for business acquisitions (See note "3 - Business Acquisitions")   714 106
Securities purchased during the year but settled after year end   58  
Non-cash financing activity:      
Transfer of trust related balances to deposits from banking clients     442
Exchange of Senior Notes (See note "14 - Borrowings") $ 256    
[1] Net impairment losses on securities include total other-than-temporary impairment losses of $15 million, $18 million, and $41 million, net of $(17) million, $(13) million, and $5 million recognized in other comprehensive income in 2012, 2011, and 2010, respectively.