Other	9 Months Ended
Sep. 30, 2014
Other [Abstract]
Other	Other Jefferson County Public Utility District (JPUD) PSE completed the sale of its electric infrastructure assets located in Jefferson County and the transition of electrical services in the county to JPUD on March 31, 2013. The proceeds from the sale exceeded the transferred assets' net carrying value of $46.7 million, resulting in a pre-tax gain of approximately $60.0 million. In its 2010 order on the subject, the Washington Commission stated that PSE must maintain such separate accounts and accounting entries as are necessary to preserve fully the Washington Commission’s opportunity to consider in an appropriate proceeding the disposition of proceeds of sale and rate treatment of this transaction. As a result, the gain was deferred and recorded as a regulatory liability. On October 31, 2013, PSE filed an accounting petition for a Washington Commission order authorizing PSE to retain $45.0 million of the gain and to return $15.0 million to its remaining customers over a period of forty-eight months. On March 28, 2014, intervenors filed response testimonies containing their respective proposals for allocation of the gain, which included a proposal of up to $57.0 million to customers and $3.0 million to PSE. A final order was rendered on September 11, 2014 authorizing PSE to retain $7.5 million of the gain and return $52.7 million to customers. The customer portion is booked to a regulatory liability account in other current liabilities and accruing interest at PSE's after-tax rate of return. PSE and the parties to the case filed a joint motion to amend the final order to allow for the customer portion to be paid to customers through a bill credit in the month of December 2014. The Commission granted the joint motion on October 1, 2014. Credit Facilities In April 2014, the Company completed a one-year extension to the liquidity and hedging facilities of PSE, extending the maturity from February 2018 to April 2019 and updating or clarifying the definitions of other terms and conditions of the facilities from when they were committed in 2013. At this same time, the Company completed an amendment to the senior secured credit facility of Puget Energy, extending the maturity from February 2017 to April 2018, updating the fee structure, eliminating a financial covenant and updating or clarifying the definitions of other terms and conditions of the facility. Term Loans In June 2014, Puget Energy entered into three bilateral term loans, with two and three year maturities, which in total, equal $299.0 million. The proceeds of these term loans were used to pay off the outstanding Puget Energy revolving credit facility balance, which subsequently allows the Company to carry the debt with lower interest expense. The terms, conditions and covenants are consistent with each other and the credit facility agreements, with the exception of maturity and price. Treasury Grants PSE received two treasury grants with a total amount of $107.9 million, related to Baker and Snoqualmie hydro facilities. These grants have been accounted as a reduction to utility plant and will be amortized over the life of the plant based on the Washington Commission authorization. The previous treatment of grants by the Washington Commission is to amortize the grants over 10 years instead of the plant life. The grants are recorded as a regulatory liability due to the 10 year amortization and treatment.

Other

Jefferson County Public Utility District (JPUD)

PSE completed the sale of its electric infrastructure assets located in Jefferson County and the transition of electrical services in the county to JPUD on March 31, 2013. The proceeds from the sale exceeded the transferred assets' net carrying value of $46.7 million, resulting in a pre-tax gain of approximately $60.0 million. In its 2010 order on the subject, the Washington Commission stated that PSE must maintain such separate accounts and accounting entries as are necessary to preserve fully the Washington Commission’s opportunity to consider in an appropriate proceeding the disposition of proceeds of sale and rate treatment of this transaction. As a result, the gain was deferred and recorded as a regulatory liability. On October 31, 2013, PSE filed an accounting petition for a Washington Commission order authorizing PSE to retain $45.0 million of the gain and to return $15.0 million to its remaining customers over a period of forty-eight months. On March 28, 2014, intervenors filed response testimonies containing their respective proposals for allocation of the gain, which included a proposal of up to $57.0 million to customers and $3.0 million to PSE. A final order was rendered on September 11, 2014 authorizing PSE to retain $7.5 million of the gain and return $52.7 million to customers. The customer portion is booked to a regulatory liability account in other current liabilities and accruing interest at PSE's after-tax rate of return. PSE and the parties to the case filed a joint motion to amend the final order to allow for the customer portion to be paid to customers through a bill credit in the month of December 2014. The Commission granted the joint motion on October 1, 2014.

Credit Facilities

In April 2014, the Company completed a one-year extension to the liquidity and hedging facilities of PSE, extending the maturity from February 2018 to April 2019 and updating or clarifying the definitions of other terms and conditions of the facilities from when they were committed in 2013. At this same time, the Company completed an amendment to the senior secured credit facility of Puget Energy, extending the maturity from February 2017 to April 2018, updating the fee structure, eliminating a financial covenant and updating or clarifying the definitions of other terms and conditions of the facility.

Term Loans

In June 2014, Puget Energy entered into three bilateral term loans, with two and three year maturities, which in total, equal $299.0 million. The proceeds of these term loans were used to pay off the outstanding Puget Energy revolving credit facility balance, which subsequently allows the Company to carry the debt with lower interest expense. The terms, conditions and covenants are consistent with each other and the credit facility agreements, with the exception of maturity and price.

Treasury Grants

PSE received two treasury grants with a total amount of $107.9 million, related to Baker and Snoqualmie hydro facilities. These grants have been accounted as a reduction to utility plant and will be amortized over the life of the plant based on the Washington Commission authorization. The previous treatment of grants by the Washington Commission is to amortize the grants over 10 years instead of the plant life. The grants are recorded as a regulatory liability due to the 10 year amortization and treatment.