Commitments and Contingencies Fiscal Year Maturity Schedule (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Loans and Mortgage-Related Securities [Abstract]
2014	$ 29,753	[1]
2015	0	[1]
2016	0	[1]
2017	0	[1]
2018	0	[1]
Thereafter	0	[1]
Total	29,753	[1]
Operating Leases [Abstract]
2014	41
2015	37
2016	29
2017	22
2018	6
Thereafter	3
Total	138
Other [Abstract]
2014	63	[2]
2015	31	[2]
2016	22	[2]
2017	2	[2]
2018	0	[2]
Thereafter	0	[2]
Total	118	[2]
Mortgage commitment derivatives [Member]
Loans and Mortgage-Related Securities [Abstract]
Total	$ 29,600

[1] Includes $29.6 billion that has been accounted for as mortgage commitment derivatives.

[2] Includes purchase commitments for certain telecom services, computer software and services, and other agreements and commitments.