Deposits Deposits (Schedule of Maturities of Domestic Deposits of One Hundred Thousand or More) (Details) (Domestic Certificates of Deposit and Other Deposits [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Domestic Certificates of Deposit and Other Deposits [Member]
Three months or less	$ 1,088	$ 1,208
Over three months to six months	544	515
Over six months to twelve months	1,065	1,085
Over twelve months	570	707
Total	$ 3,267	$ 3,515