Note 10 - Segment Information (Details) - Segment Reporting (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012		Jun. 30, 2012
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	$ 13,795	[1]	$ 14,141	[2]	$ 13,229	[1]
Goodwill	1,883		1,837		1,813
Distribution Operations [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	11,166	[1]	11,320	[2]	10,784	[1]
Goodwill	1,640		1,640		1,586
Retail Operations [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	641	[1]	511	[2]	452	[1]
Goodwill	168		122		124
Wholesale Services [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	1,008	[1]	1,218	[2]	895	[1]
Goodwill					2
Midstream Operations [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	715	[1]	720	[2]	685	[1]
Goodwill	14		14		16
Cargo Shipping [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	462	[1]	464	[2]	471	[1]
Goodwill	61		61		77
Other Segments [Member]
Note 10 - Segment Information (Details) - Segment Reporting [Line Items]
Identifiable and Total Assets	(197)	[1],[3]	(92)	[2],[4]	(58)	[1],[3]
Goodwill		[3]		[4]	$ 8	[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] The assets of our other segment consist primarily of cash and cash equivalents and PP&E, and reflect 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.