Note 2 - Significant Accounting Policies and Methods of Application (Details) - Other Income (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Component of Operating Income [Abstract]
Equity method investment income	$ 1		$ 2		$ 4		$ 5
AFUDC - equity	1		2		2		5
Other, net			2		(1)		1
Total other income	$ 2	[1]	$ 6	[1]	$ 5	[1]	$ 11	[1]

[1] Amounts revised to include prior period adjustments. See Note 13 for additional information.