Disposals and Discontinued Operations

12 Months Ended

Dec. 31, 2011

Disposals and Discontinued Operations [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

DISPOSALS

Sale of Rail Services Assets

In 2010, the Company sold certain non-strategic rail services assets for gross proceeds of approximately $23 million. The Company recognized a gain of approximately $5 million, net of a write-off of goodwill of approximately $4 million.

Sale of Gathering and Processing Assets

In 2009, the Company sold certain non-strategic gas gathering and processing assets in northern Michigan for gross proceeds of approximately $45 million, which approximated its carrying value, including goodwill of approximately $13 million.