Note 2 - Significant Accounting Policies and Methods of Application (Detail) - Cost Of Goods Sold Adjustments (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Retail Operations [Member]
LOCOM Adjustments	$ 3	$ 0
Wholesale Services [Member]
LOCOM Adjustments	18	0
Midstream Operations [Member]
LOCOM Adjustments	$ 1	$ 0