Business Acquisitions (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified										0 Months Ended	4 Months Ended	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Investor Services [Member]	Dec. 31, 2012 Investor Services [Member]	Dec. 31, 2011 Investor Services [Member]	Dec. 31, 2013 Advisor Services [Member]	Dec. 31, 2012 Advisor Services [Member]	Dec. 31, 2011 Advisor Services [Member]	Sep. 01, 2011 OptionsXpress Holdings, Inc. [Member]	Dec. 31, 2011 OptionsXpress Holdings, Inc. [Member]	Dec. 31, 2013 OptionsXpress Holdings, Inc. [Member]	Dec. 31, 2012 OptionsXpress Holdings, Inc. [Member]	Dec. 31, 2011 OptionsXpress Holdings, Inc. [Member]	Sep. 01, 2011 OptionsXpress Holdings, Inc. [Member] Common Stock [Member]	Dec. 14, 2012 Thomas Partners, Inc. [Member]	Dec. 14, 2012 Thomas Partners, Inc. [Member] Investor Services [Member]	Dec. 14, 2012 Thomas Partners, Inc. [Member] Advisor Services [Member]
Business Acquisition [Line Items]
Business acquisition, consideration paid										$ 714
Common shares issued per each share of acquiree										1.02
Business acquisition, common stock issued share															59,000,000
Fair value of common stock issued										710
Business acquisition, other noncash consideration										4
Net revenue, acquiree											68	142	179
Net income, acquiree												8	6
Business acquisition, intangible assets										285						32
Acquisition related costs, after tax, incurred by the Company and excluded from proforma net income														16
Acquisition related costs, before tax, incurred by optionsXpress Holdings, Inc., prior to the acquisition date and excluded from proforma net income														15
Amortization of purchase accounting adjustments related to intangible assets of optionsXpress Holdings, Inc., net of tax														20
Business acquisition in cash																85
Acquisition-related goodwill	$ 1,227	$ 1,228	$ 1,161	$ 1,127	$ 1,128	$ 1,083	$ 100	$ 100	$ 78							$ 68	$ 54	$ 14
Intangible assets, amortization period																11 years