Other Assets Textuals (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Components of Other Assets [Line Items]
Cost method investments	$ 6,861	$ 6,861		$ 7,033
Equity Method Investments	12,798	12,798		12,410
Income (Loss) from Affordable Housing Projects, Equity Method Investments	178	356
Low income housing tax credit (LIHTC) investment total tax benefits	274	550
Low income housing tax credit (LIHTC) investment tax credits	207	416
Low income housing tax credit (LIHTC) investment liability for unfunded commitments	2,900	$ 2,900
Low income housing tax credit (LIHTC) investment, year liability is expected to be paid		3 years
Low Income Housing Tax Credit Equity Method Investments [Member]
Components of Other Assets [Line Items]
Equity Method Investments	$ 7,887	$ 7,887		$ 7,278
Perpetual Preferred Securities NonMarketable [Member]
Components of Other Assets [Line Items]
Cost method investments			$ 689
Cost Method Investments, Fair Value Disclosure			$ 640