Note 2 - Significant Accounting Policies and Methods of Application (Details) - Cost of Goods Sold Adjustments (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Retail Operations [Member] | Three Months Ended [Member]
Note 2 - Significant Accounting Policies and Methods of Application (Details) - Cost of Goods Sold Adjustments [Line Items]
LOCOM Adjustments	$ 1
Retail Operations [Member] | Nine Months Ended [Member]
Note 2 - Significant Accounting Policies and Methods of Application (Details) - Cost of Goods Sold Adjustments [Line Items]
LOCOM Adjustments	1	3
Wholesale Services [Member] | Nine Months Ended [Member]
Note 2 - Significant Accounting Policies and Methods of Application (Details) - Cost of Goods Sold Adjustments [Line Items]
LOCOM Adjustments	8	18
Midstream Operations [Member] | Nine Months Ended [Member]
Note 2 - Significant Accounting Policies and Methods of Application (Details) - Cost of Goods Sold Adjustments [Line Items]
LOCOM Adjustments		$ 1