Fair Value Estimates for Financial Instruments Excluding Short Term Financial Assets and Liabilities and Financial Instruments Recorded at Fair Value (Detail) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Financial Assets:
Securities held to maturity	$ 15,775	$ 17,762
Loans to banking clients - net	9,700	8,725
Loans held for sale	84	185
Financial Liabilities:
Long-term debt	2,002	2,006
Carrying Amount
Financial Assets:
Securities held to maturity	15,775	17,762
Loans to banking clients - net	9,700	8,725
Loans held for sale	84	185
Financial Liabilities:
Long-term debt	2,002	2,006
Fair Value
Financial Assets:
Securities held to maturity	16,298	17,848
Loans to banking clients - net	9,341	8,469
Loans held for sale	88	194
Financial Liabilities:
Long-term debt	$ 2,146	$ 2,116

For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity.

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+ Details

- Definition

The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

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