Condensed Statement of Net Assets Acquired (Detail) (optionsXpress Holdings, Inc., USD $) In Millions	Sep. 01, 2011
optionsXpress Holdings, Inc.
Assets
Cash and cash equivalents	$ 84
Cash and investments segregated and on deposit for regulatory purposes	1,074
Receivables from brokers, dealers, and clearing organizations	40
Receivables from brokerage clients	185
Other securities owned	32
Intangible assets	285
Other assets	29
Total assets acquired	1,729	[1]
Liabilities
Payables to brokerage clients	1,221
Deferred tax liability	108
Long-term debt	110	[2]
Accrued expenses and other liabilities	83
Total liabilities assumed	1,522	[1]
Net assets acquired	$ 207

[1] All assets and liabilities, except for cash and cash equivalents, represent non-cash investing activities.

[2] The Company paid off long-term debt acquired from optionsXpress subsequent to the acquisition date in September 2011.