Note 9 - Commitments and Contingencies Schedule of Commitments and Off-Balance Sheet Arrangements (Details) (USD $) In Billions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 arrangements	Jun. 30, 2012 Unused lines of Credit [Member]	Jun. 30, 2012 Funds Held on Behalf of Customers [Member]	Dec. 31, 2011 Funds Held on Behalf of Customers [Member]
Commitments Details
Number of cash pooling arrangements	2
Pooling arrangement, cash withdrawals	$ 5
Pooling arrangement, aggregate cash deposits	5
Commitments
Unused commitment to extend credit		11
Off-balance sheet funds			$ 3	$ 3