Note 10 - Segment Information (Detail) - Segment Reporting (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Identifiable and Total Assets	$ 13,274	[1]	$ 13,913	[2]	$ 7,217	[1]
Goodwill	1,813		1,813		418
Distribution Operations [Member]
Identifiable and Total Assets	10,829	[1]	11,020	[2]	5,592	[1]
Goodwill	1,586		1,586		404
Retail Operations [Member]
Identifiable and Total Assets	452	[1]	501	[2]	189	[1]
Goodwill	124		124		0
Wholesale Services [Member]
Identifiable and Total Assets	895	[1]	1,214	[2]	1,038	[1]
Goodwill	2		2		0
Midstream Operations [Member]
Identifiable and Total Assets	685	[1]	635	[2]	476	[1]
Goodwill	16		16		14
Cargo Shipping [Member]
Identifiable and Total Assets	471	[1]	481	[2]	0	[1]
Goodwill	77		77		0
All Other Segments [Member]
Identifiable and Total Assets	(58)	[1],[3]	62	[2],[4]	(78)	[1],[3]
Goodwill	$ 8	[3]	$ 8	[4]	$ 0	[3]

[1] Identifiable assets are those used in each segment's operations.

[2] Identifiable assets are those assets used in each segment's operations.

[3] Our other segment's assets consist primarily of cash and cash equivalents, PP&E and the effect of intercompany eliminations.

[4] Our other segment's assets consist primarily of cash and cash equivalents and PP&E and reflect the effect of intercompany eliminations.