Accounting Policies (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Investment owned balance shares	1,300,000
Total shares of BlackRock Series C Preferred Stock transferred	205,350
Charge off threshold - small business commercial loans	$ 1
Impact Of Alignment With Regulatory Guidance Nonperforming Loans	426
Impact Of Alignment With Regulatory Guidance Net Chargeoffs	134
Impact Of Alignment With Regulatory Guidance Overall Delinquencies	$ 395
Blackrock Series B Preferred Stock [Member]
Investment Owned Preferred Stock Transferred for Common Stock	2,000,000