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Long-Term Debt and Liquidity Matters | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Long-Term Debt and Liquidity Matters | Long-Term Debt and Liquidity Matters Pinnacle West and APS maintain committed revolving credit facilities in order to enhance liquidity and provide credit support for their commercial paper programs, to refinance indebtedness, and for other general corporate purposes. Pinnacle West On May 5, 2020, Pinnacle West refinanced its 364-day $50 million term loan agreement with a new 364-day $31 million term loan agreement that would have matured May 4, 2021. Borrowings under the agreement bore interest at Eurodollar Rate plus 1.40% per annum. At March 31, 2021, Pinnacle West had $15 million in outstanding borrowings under the current agreement, all of which was repaid on April 27, 2021. On December 23, 2020, Pinnacle West entered into a $150 million term loan facility that matures June 2022. The proceeds were received on January 4, 2021 and used for general corporate purposes. We recognized the term loan facility as long-term debt upon settlement on January 4, 2021. At March 31, 2021, Pinnacle West had a $200 million revolving credit facility that matures in July 2023. Pinnacle West has the option to increase the amount of the facility up to a maximum of $300 million upon the satisfaction of certain conditions and with the consent of the lenders. Interest rates are based on Pinnacle West’s senior unsecured debt credit ratings. The facility is available to support Pinnacle West’s $200 million commercial paper program, for bank borrowings or for issuances of letters of credits. At March 31, 2021, Pinnacle West had no outstanding borrowings under its credit facility, no letters of credit outstanding and $0.3 million of outstanding commercial paper borrowings. APS At March 31, 2021, APS had two revolving credit facilities totaling $1 billion, including a $500 million credit facility that matures in June 2022 and a $500 million facility that matures in July 2023. APS may increase the amount of each facility up to a maximum of $700 million, for a total of $1.4 billion, upon the satisfaction of certain conditions and with the consent of the lenders. Interest rates are based on APS’s senior unsecured debt credit ratings. These facilities are available to support APS’s $750 million commercial paper program, for bank borrowings or for issuances of letters of credit. At March 31, 2021, APS had no outstanding borrowings under its revolving credit facilities, no letters of credit outstanding, and $199.5 million of outstanding commercial paper borrowings. On December 17, 2020, the ACC issued a financing order in which, subject to specified parameters and procedures, it approved APS’s short-term debt authorization equal to the sum of (i) 7% of APS’s capitalization, and (ii) $500 million (which is required to be used for costs relating to purchases of natural gas and power) and a long-term debt authorization of $7.5 billion. See “Financial Assurances” in Note 8 for a discussion of other outstanding letters of credit. Debt Fair Value Our long-term debt fair value estimates are classified within Level 2 of the fair value hierarchy. The following table presents the estimated fair value of our long-term debt, including current maturities (dollars in thousands):
| As of March 31, 2021 |  | As of December 31, 2020
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Pinnacle West | $ | 646,525 |  |  | $ | 653,395 |  |  | $ | 496,321 |  |  | $ | 509,050 |
APS | 5,818,520 |  |  | 6,436,224 |  |  | 5,817,945 |  |  | 7,103,791 |
Total | $ | 6,465,045 |  |  | $ | 7,089,619 |  |  | $ | 6,314,266 |  |  | $ | 7,612,841 |

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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