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Note 12 - Income Taxes (Details) - Income Tax Expense (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current income taxes
Federal	$ 166	$ 9	$ (89)
State	35	4	1
Deferred income taxes
Federal	2	134	196
State	(9)	20	18
Amortization of investment tax credits	(3)	(3)	(1)
Total	$ 191	$ 164	$ 125

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.