Rate and Regulatory Matters	3 Months Ended
Mar. 31, 2012
Rate and Regulatory Matters [Abstract]
RATE AND REGULATORY MATTERS	2. RATE AND REGULATORY MATTERS Rate Case Settlement Filing On March 15, 2012, we filed a Stipulation and Settlement Agreement (Settlement) with the FERC. The supporting or non-opposing customers named in the Settlement represent approximately 99.5 percent of our long-term firm transportation and storage capacity. The Settlement specified an annual cost of service of $466.5 million and established a new general system firm transportation rate of $0.44 per dekatherm, a 7.4 percent increase over the current rate. New rates will become effective January 1, 2013, and will remain in effect for a minimum of 3 years and a maximum of 5 years. The settlement is subject to FERC approval. We anticipate the approval process will be completed by the end of the second quarter 2012.

Rate and Regulatory Matters

3 Months Ended

Mar. 31, 2012

Rate and Regulatory Matters [Abstract]

2. RATE AND REGULATORY MATTERS

Rate Case Settlement Filing

On March 15, 2012, we filed a Stipulation and Settlement Agreement (Settlement) with the FERC. The supporting or non-opposing customers named in the Settlement represent approximately 99.5 percent of our long-term firm transportation and storage capacity. The Settlement specified an annual cost of service of $466.5 million and established a new general system firm transportation rate of $0.44 per dekatherm, a 7.4 percent increase over the current rate. New rates will become effective January 1, 2013, and will remain in effect for a minimum of 3 years and a maximum of 5 years. The settlement is subject to FERC approval. We anticipate the approval process will be completed by the end of the second quarter 2012.