Parent Company Financial Information- Condensed Statements of Financial Position (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and equivalents		$ 9,321	$ 12,325	$ 11,828	$ 2,319
Investment securities		5,110	3,142
Goodwill		949	949	949
Other assets	[1]	2,122	2,080
Total assets		90,207	83,990
Liabilities and Equity
Unsecured debt		0	4,133
Accrued expenses and other liabilities		3,809	3,740
Total liabilities		76,011	71,386
Equity:
Total equity		14,196	12,604	10,478	5,960
Total liabilities and equity		90,207	83,990
Senior Notes
Liabilities and Equity
Unsecured debt	[2]	7,759	6,557
Bank term loan
Liabilities and Equity
Unsecured debt	[2]	0	4,133
Parent Company
Assets
Cash and equivalents		2,474	5,301	$ 5,643	$ 0
Investment securities		2,205	2,014
Investments in amounts due from subsidiaries	[3]	17,809	16,329
Goodwill		17	17
Other assets		192	283
Total assets		22,697	23,944
Liabilities and Equity
Amounts due to subsidiaries		272	211
Accrued expenses and other liabilities		470	439
Total liabilities		8,501	11,340
Equity:
Total equity		14,196	12,604
Total liabilities and equity		22,697	23,944
Parent Company | Senior Notes
Liabilities and Equity
Unsecured debt		7,759	6,557
Parent Company | Bank term loan
Liabilities and Equity
Bank term loan		$ 0	$ 4,133

[1] Other assets include restricted cash and equivalents of $347 million and $391 million at December 31, 2016 and 2015, respectively.

[2] The amounts presented above for outstanding borrowings include unamortized debt premiums, discounts and issuance costs.

[3] Includes investments in and amounts due from bank subsidiaries of $11.0 billion and $9.4 billion at December 31, 2016 and 2015, respectively.