Note 2 - Significant Accounting Policies and Methods of Application (Detail) - Cost Of Goods Sold Adjustments (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Retail Operations [Member]
LOCOM Adjustments	$ 0	$ 0	$ 3	$ 0
Wholesale Services [Member]
LOCOM Adjustments	0	0	18	0
Midstream Operations [Member]
LOCOM Adjustments	$ 0	$ 0	$ 1	$ 0