Note 2 - Significant Accounting Policies and Methods of Application (Details) - Other Income (Expense), Net (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Other Income (Expense), Net [Abstract]
Equity investment income (1)	$ 2	[1]	$ 5	[1]	$ 5	[1]	$ 8	[1]
Allowance for funds used during construction (AFUDC) - equity	3		1		6		2
Other, net	2		3		1		3
Total other income	$ 7		$ 9		$ 12		$ 13

[1] Primarily relates to our investment in Triton. See Note 8 for additional information.