Other Accruals	9 Months Ended
Sep. 30, 2013
Other Income and Expenses [Abstract]
Other Accruals	OTHER ACCRUALS. Eminence Storage Field Abandonment — Due to the abandonment and retirement of four of the seven caverns at our Eminence Storage Field in 2013 and the expected recovery of such costs in our rates, we have reclassified $92 million of costs related to the Eminence ARO from Total property, plant and equipment, net to Regulatory assets (Eminence abandonment regulatory asset). Included in Other (income) expense, net, for the three and nine months ended September 30, 2013, consistent with the pending stipulation and agreement filed in our Docket No. RP12-993 general rate case proceeding, is a charge of $8.1 million and $14.5 million, respectively, related to the portion of the Eminence abandonment regulatory asset that will not be recovered in rates. We have also recognized income for the three and nine months ended September 30, 2013 of $3.3 million and $15.4 million, respectively, related to insurance recoveries associated with this event.

Other Accruals

9 Months Ended

Sep. 30, 2013

Other Income and Expenses [Abstract]

OTHER ACCRUALS.

Eminence Storage Field Abandonment — Due to the abandonment and retirement of four of the seven caverns at our Eminence Storage Field in 2013 and the expected recovery of such costs in our rates, we have reclassified $92 million of costs related to the Eminence ARO from Total property, plant and equipment, net to Regulatory assets (Eminence abandonment regulatory asset). Included in Other (income) expense, net, for the three and nine months ended September 30, 2013, consistent with the pending stipulation and agreement filed in our Docket No. RP12-993 general rate case proceeding, is a charge of $8.1 million and $14.5 million, respectively, related to the portion of the Eminence abandonment regulatory asset that will not be recovered in rates. We have also recognized income for the three and nine months ended September 30, 2013 of $3.3 million and $15.4 million, respectively, related to insurance recoveries associated with this event.