Note 12 - Income Taxes (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 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	14
Decreases related to prior period tax positions	(7)
Increases related to current period tax positions	22
Settlements	(2)
Gross amounts of unrecognized tax benefits, end of period	367
Accrued interest and penalties	$ 71	$ 117

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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