Note 11 - Segment Information (Details) - Operating Revenues (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,462	[1]	$ 1,612	[1]
Thrid Party Gross Costs	1,400	[1]	920	[1]
Third Party Gross Revenues [Member] | Operating Segments [Member] | Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	4,049		2,094
Intercompany Revenues [Member] | Operating Segments [Member] | Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	298		140
Total Gross Revenues [Member] | Operating Segments [Member] | Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	4,347		2,234
Third Party Gross Costs [Member] | Operating Segments [Member] | Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Thrid Party Gross Costs	4,016		2,195
Operating Segments [Member] | Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	331	[1],[2]	39	[1],[2]
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,462	[1]	1,612	[1]
Wholesale Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	331	[1],[2]	39	[1],[2]
Thrid Party Gross Costs	$ 3	[1],[2]	$ 10	[1],[2]

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

[2] Wholesale services records its energy marketing and risk management revenues on a net basis. A reconciliation of our operating revenues and our intercompany revenues is shown in the following table.