Note 2 - Significant Accounting Policies and Methods of Application (Detail) - Property, Plant & Equipment (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
PP&E	$ 10,478	$ 9,779
Less accumulated depreciation	2,131	1,879
Total net PP&E	8,347	7,900
Gas, Transmission and Distribution Equipment [Member]
PP&E	7,992	7,579
Storage [Member]
PP&E	1,149	931
Shipping Vessels and Containers [Member]
PP&E	145	146
Property, Plant and Equipment, Other Types [Member]
PP&E	820	747
Construction in Progress [Member]
PP&E	$ 372	$ 376

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details