Segment Information (Financial Information for Reportable Segments) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Revenues
Asset management and administration fees	[1]									$ 3,055	$ 2,650	$ 2,533
Net interest revenue										3,322	2,525	2,272
Trading revenue										825	866	907
Other										271	328	343
Provision for loan losses										5	11	4
Net impairment losses on securities												(1)
Total net revenues		$ 1,972	$ 1,914	$ 1,828	$ 1,764	$ 1,691	$ 1,597	$ 1,566	$ 1,526	7,478	6,380	6,058
Expenses Excluding Interest		$ 1,148	$ 1,120	$ 1,108	$ 1,109	$ 1,046	$ 1,014	$ 999	$ 1,042	4,485	4,101	3,943
Income before taxes on income										2,993	2,279	2,115
Capital expenditures										353	285	405
Depreciation and amortization										234	224	199
Non-recurring revenue												45
Investor Services [Member]
Net Revenues
Asset management and administration fees										2,093	1,837	1,742
Net interest revenue										2,591	2,133	2,028
Trading revenue										524	556	606
Other										199	234	218
Provision for loan losses										4	11	4
Net impairment losses on securities												(1)
Total net revenues										5,411	4,771	4,597
Expenses Excluding Interest										3,380	3,090	2,937
Income before taxes on income										2,031	1,681	1,660
Capital expenditures										234	195	271
Depreciation and amortization										180	171	154
Advisor Services [Member]
Net Revenues
Asset management and administration fees										962	813	791
Net interest revenue										731	392	244
Trading revenue										301	310	301
Other										72	94	74
Provision for loan losses										1
Total net revenues										2,067	1,609	1,410
Expenses Excluding Interest										1,105	1,011	938
Income before taxes on income										962	598	472
Capital expenditures										119	90	134
Depreciation and amortization										$ 54	$ 53	45
Unallocated [Member]
Net Revenues
Other												51
Total net revenues												51
Expenses Excluding Interest												68
Income before taxes on income												(17)
Estimated severance benefits												$ 68

[1] Includes fee waivers of $224, $672, and $751 during the years ended December 31, 2016, 2015, and 2014, respectively,relating to Schwab-sponsored money market funds.