SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
Dec. 31, 2012
Pipeline and compression \| Minimum
PLANT, PROPERTY AND EQUIPMENT
Estimated useful life	20 years
Pipeline and compression \| Maximum
PLANT, PROPERTY AND EQUIPMENT
Estimated useful life	30 years
Metering and other \| Minimum
PLANT, PROPERTY AND EQUIPMENT
Estimated useful life	5 years
Metering and other \| Maximum
PLANT, PROPERTY AND EQUIPMENT
Estimated useful life	30 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration