Note 10 - Non-Wholly Owned Entities (Details) - SouthStar’s assets and liabilities (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Current assets	$ 2,733		$ 2,668
Goodwill and other intangible assets	2,061		1,933
Long-term assets and other deferred debit	9,862		9,540
Total assets	14,656	[1]	14,141	[1]
Current liabilities	3,122		3,338
Long-term liabilities and other deferred credits	7,858		7,368
Total Liabilities	10,980		10,706
Equity	3,676		3,435		3,339	1,836
Total liabilities and equity	14,656		14,141
South Star [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Current assets	264	[2]	201	[2]
Goodwill and other intangible assets	139	[2]		[2]
Long-term assets and other deferred debit	12	[2]	10	[2]
Total assets	415	[2]	211	[2]
Current liabilities	95	[2]	62	[2]
Long-term liabilities and other deferred credits		[2]		[2]
Total Liabilities	95	[2]	62	[2]
Equity	320	[2]	149	[2]
Total liabilities and equity	$ 415	[2]	$ 211	[2]
South Star Percentage To Consolidated [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Current assets	10.00%	[3]	8.00%	[3]
Goodwill and other intangible assets	7.00%	[3]		[3]
Long-term assets and other deferred debit		[3]		[3]
Total assets	3.00%	[3]	1.00%	[3]
Current liabilities	3.00%	[3]	2.00%	[3]
Long-term liabilities and other deferred credits		[3]		[3]
Total Liabilities	1.00%	[3]	1.00%	[3]
Equity	9.00%	[3]	4.00%	[3]
Total liabilities and equity	3.00%	[3]	1.00%	[3]

[1] Identifiable assets are those dedicated to each segment's operations.

[2] These amounts reflect information for SouthStar and exclude intercompany eliminations and the balances of our wholly owned subsidiary with an 85% ownership interest in SouthStar.

[3] SouthStar's percentage of the amount on our Consolidated Statements of Financial Position.