ASSET IMPAIRMENTS	12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
ASSET IMPAIRMENTS	ASSET IMPAIRMENTS Natural Gas Storage Disposal Group In connection with the classification of our Natural Gas Storage disposal group as held for sale in December 2013 we performed a valuation to measure the disposal group at fair value less costs to sell (see Note 18 for more information). The estimated fair value less costs to sell was determined to be less than its carrying value, which resulted in the recognition of a non-cash asset impairment charge of $169.0 million in the fourth quarter of 2013, which included the write-down of long-lived assets. In July 2014, we signed a purchase and sale agreement to sell our Natural Gas Storage disposal group. As a result of the execution of the purchase and sale agreement, subsequent changes in the carrying value of the net assets of our Natural Gas Storage disposal group and the completed sale in December 2014 (as discussed in Note 4), we recorded additional non-cash asset impairment charges of $23.4 million during the year ended December 31, 2014. We recorded these asset impairment charges within “Loss from discontinued operations” on our consolidated statements of operations for the years ended December 31, 2014 and 2013, respectively. Refer to Note 18 for further discussion. NORCO Pipeline System During the third and fourth quarters of 2012, management performed extensive integrity tests on a portion of our NORCO pipeline system, consisting of approximately 169 miles of liquid petroleum products pipelines and related assets in Indiana and Illinois. Upon completion of the integrity tests in the fourth quarter of 2012, management determined that projected integrity costs, which included work required to maintain the line to our integrity standards, were in excess of the amounts that would be recoverable through operation of the line and proposed the abandonment of this portion of our NORCO pipeline system. On December 13, 2012, the Board approved management’s plan. Based on the determination to abandon this pipeline, we were able to estimate the settlement date for the asset retirement obligation and therefore recorded a liability of $12.1 million as of December 31, 2012 for our estimated costs of abandonment, which we began incurring in 2013. We also compared the undiscounted future cash flows to the carrying value of the assets, including the asset retirement cost associated with the removal and decommissioning of the pipeline. Since the carrying value exceeded the undiscounted cash flows, we estimated the fair value of the assets using the expected present value of future cash flows to be minimal and recorded a $60.0 million non-cash asset impairment charge in December 2012 in our Domestic Pipelines & Terminals segment. In January 2013, we ceased operations on the affected portion of the system. In 2014, we recorded a $3.8 million reduction in our ARO due to revised estimated costs of abandonment. The ARO represents our best estimate of the costs to be incurred with information currently available and is based on certain assumptions, including assumptions about methods of abandonment to be employed and our requirements in applicable rights-of-way agreements.

ASSET IMPAIRMENTS

Natural Gas Storage Disposal Group

In connection with the classification of our Natural Gas Storage disposal group as held for sale in December 2013 we performed a valuation to measure the disposal group at fair value less costs to sell (see Note 18 for more information). The estimated fair value less costs to sell was determined to be less than its carrying value, which resulted in the recognition of a non-cash asset impairment charge of $169.0 million in the fourth quarter of 2013, which included the write-down of long-lived assets. In July 2014, we signed a purchase and sale agreement to sell our Natural Gas Storage disposal group. As a result of the execution of the purchase and sale agreement, subsequent changes in the carrying value of the net assets of our Natural Gas Storage disposal group and the completed sale in December 2014 (as discussed in Note 4), we recorded additional non-cash asset impairment charges of $23.4 million during the year ended December 31, 2014. We recorded these asset impairment charges within “Loss from discontinued operations” on our consolidated statements of operations for the years ended December 31, 2014 and 2013, respectively. Refer to Note 18 for further discussion.

NORCO Pipeline System

During the third and fourth quarters of 2012, management performed extensive integrity tests on a portion of our NORCO pipeline system, consisting of approximately 169 miles of liquid petroleum products pipelines and related assets in Indiana and Illinois. Upon completion of the integrity tests in the fourth quarter of 2012, management determined that projected integrity costs, which included work required to maintain the line to our integrity standards, were in excess of the amounts that would be recoverable through operation of the line and proposed the abandonment of this portion of our NORCO pipeline system. On December 13, 2012, the Board approved management’s plan. Based on the determination to abandon this pipeline, we were able to estimate the settlement date for the asset retirement obligation and therefore recorded a liability of $12.1 million as of December 31, 2012 for our estimated costs of abandonment, which we began incurring in 2013. We also compared the undiscounted future cash flows to the carrying value of the assets, including the asset retirement cost associated with the removal and decommissioning of the pipeline. Since the carrying value exceeded the undiscounted cash flows, we estimated the fair value of the assets using the expected present value of future cash flows to be minimal and recorded a $60.0 million non-cash asset impairment charge in December 2012 in our Domestic Pipelines & Terminals segment. In January 2013, we ceased operations on the affected portion of the system. In 2014, we recorded a $3.8 million reduction in our ARO due to revised estimated costs of abandonment. The ARO represents our best estimate of the costs to be incurred with information currently available and is based on certain assumptions, including assumptions about methods of abandonment to be employed and our requirements in applicable rights-of-way agreements.