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Note 12 - Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Changes in unrecognized tax benefits
Gross amounts of unrecognized tax benefits, beginning of period	$ 340
Increases related to prior period tax positions	21
Decreases related to prior period tax positions	(5)
Increases related to current period tax positions	10
Gross amounts of unrecognized tax benefits, end of period	366
Accrued interest and penalties	$ 127	$ 117

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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