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Debt and Credit Agreements | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Debt and Credit Agreements | Debt and Credit Agreements Long-Term Debt The following table summarizes long-term debt (rates and terms are as of December 31, 2017) of Edison International and SCE:
| December 31,
(in millions) | 2017 |  | 2016
Edison International Parent and Other: |  |  |
Debentures and notes: |  |  |
2020 – 2023 (2.125% to 2.95%) | $ | 1,200 |  |  | $ | 800 |
Other long-term debt | 29 |  |  | 32 |
Current portion of long-term debt | (2 | ) |  | (402 | )
Unamortized debt discount and issuance costs, net | (13 | ) |  | (9 | )
Total Edison International Parent and Other | 1,214 |  |  | 421 |
SCE: |  |  |
First and refunding mortgage bonds: |  |  |
2018 – 2047 (1.845% to 6.05%) | 9,779 |  |  | 9,357 |
Pollution-control bonds: |  |  |
2028 – 2035 (1.375% to 5.0%)1 | 909 |  |  | 774 |
Debentures and notes: |  |  |
2029 – 2053 (5.06% to 6.65%) | 307 |  |  | 307 |
Current portion of long-term debt | (479 | ) |  | (579 | )
Unamortized debt discount and issuance costs, net | (88 | ) |  | (105 | )
Total SCE | 10,428 |  |  | 9,754 |
Total Edison International | $ | 11,642 |  |  | $ | 10,175 |
1 | Excludes outstanding bonds that have not been retired and may be remarketed to investors in the future. These bonds have variable rates and are due in 2031 at December 31, 2017 and 2031 and 2033 at December 31, 2016.
Edison International and SCE long-term debt maturities over the next five years are the following:
(in millions) | Edison International |  | SCE
2018 | $ | 481 |  |  | $ | 479 |
2019 | 81 |  |  | 79 |
2020 | 481 |  |  | 79 |
2021 | 580 |  |  | 579 |
2022 | 777 |  |  | 364 |
Project Financings As of December 31, 2017 and 2016, indirect subsidiaries of Edison Energy Group owning solar projects had approximately $31 million (includes short-term debt of $16 million) and $22 million outstanding project debt financings with maturity dates to 2022 with weighted average interest rates of 4.50% and 4.86%. Remaining borrowings available under these agreements are approximately $67 million. Under two of the tax equity financings, tax equity investors in related solar projects receive 99% of taxable profits and losses and tax credits of the projects as determined for federal income tax purposes for a 6-year period following the completion of the portfolio of projects and receive a priority return of 2% of their investment per year. After the 6-year period, the tax equity investors receive 5% of the taxable profits and losses and cash flow. A subsidiary of Edison Energy Group has a call option for a 9-month period following 5 years after completion of the portfolio of projects to purchase the tax equity investors interest and each tax equity investor has the right to put its ownership interest to such subsidiary in the event that the call option is not exercised. Remaining tax equity financings under these agreements are approximately $21 million. Under a third tax equity financing completed in 2017, the tax equity investor in the related solar projects will receive an initial allocation of 99% of taxable losses and tax credits, followed by 67% of taxable income and losses after the initial period and 28.4% of cash flows until certain conditions are met, including attaining a specified rate of return. A subsidiary of Edison Energy Group has the option after certain conditions are met to purchase the tax equity investor's interest at the higher of fair value or the after-tax amount necessary to achieve a specified 20-year rate of return. Remaining tax equity financings under these agreements are approximately $38 million. An indirect subsidiary of Edison Energy Group also entered into a non-recourse debt financing to support equity contributions in certain solar projects. The maturity date of the borrowings under this agreement is December 31, 2036. As of December 31, 2017 and 2016, there was $10 million outstanding under this agreement at a weighted average interest rate of 9%. Liens and Security Interests Almost all of SCE's properties are subject to a trust indenture lien. SCE has pledged first and refunding mortgage bonds as collateral for borrowed funds obtained from pollution-control bonds issued by government agencies. SCE has a debt covenant that requires a debt to total capitalization ratio be met. At December 31, 2017, SCE was in compliance with this debt covenant and all other financial covenants that affect access to capital. All of the properties subject to the Edison Energy Group project financings discussed above are subject to a lien. Credit Agreements and Short-Term Debt The following table summarizes the status of the credit facilities at December 31, 2017:
(in millions) | Edison International Parent |  | SCE
Commitment | $ | 1,250 |  |  | $ | 2,750 |
Outstanding borrowings | (1,139 | ) |  | (1,238 | )
Outstanding letters of credit | — |  |  | (99 | )
Amount available | $ | 111 |  |  | $ | 1,413 |
SCE and Edison International Parent have multi-year revolving credit facilities of $2.75 billion and $1.25 billion, respectively, with both maturing in July 2022. SCE's credit facility is generally used to support commercial paper borrowings and letters of credit issued for procurement-related collateral requirements, balancing account undercollections and for general corporate purposes, including working capital requirements to support operations and capital expenditures. Edison International Parent's credit facility is used to support commercial paper borrowings and for general corporate purposes. At December 31, 2017, commercial paper supported by SCE's credit facility, net of discount, was $738 million at a weighted-average interest rate of 1.75%. In December 2017, SCE borrowed $500 million from the credit facility which had an interest rate of 2.46% on December 31, 2017. In January 2018, SCE repaid its $500 million borrowings with cash on hand. At December 31, 2017, letters of credit issued under SCE's credit facility aggregated $99 million and are scheduled to expire in twelve months or less. At December 31, 2016, the outstanding commercial paper, net of discount, was $769 million at a weighted-average interest rate of 0.9%. At December 31, 2017, Edison International Parent's outstanding commercial paper, net of discount, was $639 million at a weighted-average interest rate of 1.70%. This commercial paper was supported by the $1.25 billion multi-year revolving credit facility. In December 2017, Edison International borrowed $500 million from the credit facility which had an interest rate of 2.56% on December 31, 2017. In January 2018, Edison International repaid its $500 million borrowings with cash on hand. At December 31, 2016, the outstanding commercial paper, net of discount, was $538 million at a weighted-average interest rate of 0.97%. Debt Financing Subsequent to December 31, 2017 In January 2018, Edison International Parent borrowed $500 million under a Term Loan Agreement due in January 2019, with a variable interest rate based on the London Interbank Offered Rate plus 60 basis points. The proceeds were used to repay Edison International Parent's commercial paper borrowings discussed above.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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