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Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2018
Summary Of The Borrowings Outstanding And Capacity Available Under The Facility | Following is a summary of the borrowings outstanding and capacity available under the facility as of March 31, 2018.
Capacity |  | Borrowings |  | Letters of Credit |  | Capacity Available
(In Millions)
$3,500 |  | $1,125 |  | $6 |  | $2,369
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel | To finance the acquisition and ownership of nuclear fuel, the nuclear fuel company VIEs have credit facilities and three of the four VIEs also issued commercial paper as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Weighted Average Interest Rate on Borrowings (a) |  | Amount Outstanding as of March 31, 2018
|  |  |  | (Dollars in Millions)
Entergy Arkansas VIE |  | May 2019 |  | $80 |  | 3.74% |  | $43.9 (b)
Entergy Louisiana River Bend VIE |  | May 2019 |  | $105 |  | 2.82% |  | $52.3
Entergy Louisiana Waterford VIE |  | May 2019 |  | $85 |  | 3.35% |  | $62.9 (b)
System Energy VIE |  | May 2019 |  | $120 |  | 3.46% |  | $43.2 (b)
(a) | Includes letter of credit fees and bank fronting fees on commercial paper issuances by the nuclear fuel company variable interest entities for Entergy Arkansas, Entergy Louisiana, and System Energy. The nuclear fuel company variable interest entity for Entergy Louisiana River Bend does not issue commercial paper, but borrows directly on its bank credit facility.
(b) | The total amount outstanding as of March 31, 2018 is commercial paper, and is classified as a current liability.
Notes Payable By Variable Interest Entities | The nuclear fuel company variable interest entities had notes payable that are included in debt on the respective balance sheets as of March 31, 2018 as follows:
Company |  | Description |  | Amount
Entergy Arkansas VIE |  | 3.65% Series L due July 2021 |  | $90 million
Entergy Arkansas VIE |  | 3.17% Series M due December 2023 |  | $40 million
Entergy Louisiana River Bend VIE |  | 3.38% Series R due August 2020 |  | $70 million
Entergy Louisiana Waterford VIE |  | 3.92% Series H due February 2021 |  | $40 million
Entergy Louisiana Waterford VIE |  | 3.22% Series I due December 2023 |  | $20 million
System Energy VIE |  | 3.78% Series I due October 2018 |  | $85 million
System Energy VIE |  | 3.42% Series J due April 2021 |  | $100 million
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
Entergy Arkansas [Member] |
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel | To finance the acquisition and ownership of nuclear fuel, the nuclear fuel company VIEs have credit facilities and three of the four VIEs also issued commercial paper as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Weighted Average Interest Rate on Borrowings (a) |  | Amount Outstanding as of March 31, 2018
|  |  |  | (Dollars in Millions)
Entergy Arkansas VIE |  | May 2019 |  | $80 |  | 3.74% |  | $43.9 (b)
Entergy Louisiana River Bend VIE |  | May 2019 |  | $105 |  | 2.82% |  | $52.3
Entergy Louisiana Waterford VIE |  | May 2019 |  | $85 |  | 3.35% |  | $62.9 (b)
System Energy VIE |  | May 2019 |  | $120 |  | 3.46% |  | $43.2 (b)
(a) | Includes letter of credit fees and bank fronting fees on commercial paper issuances by the nuclear fuel company variable interest entities for Entergy Arkansas, Entergy Louisiana, and System Energy. The nuclear fuel company variable interest entity for Entergy Louisiana River Bend does not issue commercial paper, but borrows directly on its bank credit facility.
(b) | The total amount outstanding as of March 31, 2018 is commercial paper, and is classified as a current liability.
Notes Payable By Variable Interest Entities | The nuclear fuel company variable interest entities had notes payable that are included in debt on the respective balance sheets as of March 31, 2018 as follows:
Company |  | Description |  | Amount
Entergy Arkansas VIE |  | 3.65% Series L due July 2021 |  | $90 million
Entergy Arkansas VIE |  | 3.17% Series M due December 2023 |  | $40 million
Entergy Louisiana River Bend VIE |  | 3.38% Series R due August 2020 |  | $70 million
Entergy Louisiana Waterford VIE |  | 3.92% Series H due February 2021 |  | $40 million
Entergy Louisiana Waterford VIE |  | 3.22% Series I due December 2023 |  | $20 million
System Energy VIE |  | 3.78% Series I due October 2018 |  | $85 million
System Energy VIE |  | 3.42% Series J due April 2021 |  | $100 million
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
Entergy Louisiana [Member] |
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel | To finance the acquisition and ownership of nuclear fuel, the nuclear fuel company VIEs have credit facilities and three of the four VIEs also issued commercial paper as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Weighted Average Interest Rate on Borrowings (a) |  | Amount Outstanding as of March 31, 2018
|  |  |  | (Dollars in Millions)
Entergy Arkansas VIE |  | May 2019 |  | $80 |  | 3.74% |  | $43.9 (b)
Entergy Louisiana River Bend VIE |  | May 2019 |  | $105 |  | 2.82% |  | $52.3
Entergy Louisiana Waterford VIE |  | May 2019 |  | $85 |  | 3.35% |  | $62.9 (b)
System Energy VIE |  | May 2019 |  | $120 |  | 3.46% |  | $43.2 (b)
(a) | Includes letter of credit fees and bank fronting fees on commercial paper issuances by the nuclear fuel company variable interest entities for Entergy Arkansas, Entergy Louisiana, and System Energy. The nuclear fuel company variable interest entity for Entergy Louisiana River Bend does not issue commercial paper, but borrows directly on its bank credit facility.
(b) | The total amount outstanding as of March 31, 2018 is commercial paper, and is classified as a current liability.
Notes Payable By Variable Interest Entities | The nuclear fuel company variable interest entities had notes payable that are included in debt on the respective balance sheets as of March 31, 2018 as follows:
Company |  | Description |  | Amount
Entergy Arkansas VIE |  | 3.65% Series L due July 2021 |  | $90 million
Entergy Arkansas VIE |  | 3.17% Series M due December 2023 |  | $40 million
Entergy Louisiana River Bend VIE |  | 3.38% Series R due August 2020 |  | $70 million
Entergy Louisiana Waterford VIE |  | 3.92% Series H due February 2021 |  | $40 million
Entergy Louisiana Waterford VIE |  | 3.22% Series I due December 2023 |  | $20 million
System Energy VIE |  | 3.78% Series I due October 2018 |  | $85 million
System Energy VIE |  | 3.42% Series J due April 2021 |  | $100 million
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
Entergy Mississippi [Member] |
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
Entergy New Orleans [Member] |
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
Entergy Texas [Member] |
Credit Facilities | Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, and Entergy Texas each had credit facilities available as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Interest Rate (a) |  | Amount Drawn as of March 31, 2018 |  | Letters of Credit Outstanding as of March 31, 2018
Entergy Arkansas |  | April 2018 |  | $20 million (b) |  | 3.14% |  | $— |  | $—
Entergy Arkansas |  | August 2022 |  | $150 million (c) |  | 3.12% |  | $50 million |  | $—
Entergy Louisiana |  | August 2022 |  | $350 million (c) |  | 2.94% |  | $100 million |  | $9.1 million
Entergy Mississippi |  | May 2018 |  | $37.5 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $35 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $20 million (d) |  | 3.39% |  | $— |  | $—
Entergy Mississippi |  | May 2018 |  | $10 million (d) |  | 3.39% |  | $— |  | $—
Entergy New Orleans |  | November 2018 |  | $25 million (c) |  | 3.36% |  | $— |  | $0.8 million
Entergy Texas |  | August 2022 |  | $150 million (c) |  | 3.39% |  | $— |  | $24.4 million
(a) | For credit facilities with no borrowings as of March 31, 2018, the interest rate is the estimated interest rate as of March 31, 2018 that would have been applied to outstanding borrowings under the facility.
(b) | Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option. In April 2018, Entergy Arkansas renewed its credit facility through April 2019.
(c) | The credit facility includes fronting commitments for the issuance of letters of credit against a portion of the borrowing capacity of the facility as follows: $5 million for Entergy Arkansas; $15 million for Entergy Louisiana; $10 million for Entergy New Orleans; and $30 million for Entergy Texas.
(d) | Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option. Entergy Mississippi expects to renew its credit facilities prior to expiration.
Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations [Table Text Block] | Following is a summary of the uncommitted standby letter of credit facilities as of March 31, 2018:
Company |  | Amount of Uncommitted Facility |  | Letter of Credit Fee |  | Letters of Credit Issued as of March 31, 2018 (a)
Entergy Arkansas |  | $25 million |  | 0.70% |  | $1 million
Entergy Louisiana |  | $125 million |  | 0.70% |  | $23.8 million
Entergy Mississippi |  | $40 million |  | 0.70% |  | $16.6 million
Entergy New Orleans |  | $15 million |  | 1.00% |  | $4.8 million
Entergy Texas |  | $50 million |  | 0.70% |  | $25.6 million
(a) | As of March 31, 2018, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Arkansas, $0.1 million for Entergy Mississippi, and $0.2 million for Entergy Texas. See Note 8 to the financial statements herein for discussion of financial transmission rights.
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
System Energy [Member] |
Short-Term Borrowings And The Outstanding Short-Term Borrowings | The following are the FERC-authorized limits for short-term borrowings and the outstanding short-term borrowings as of March 31, 2018 (aggregating both internal and external short-term borrowings) for the Registrant Subsidiaries:
| Authorized |  | Borrowings
| (In Millions)
Entergy Arkansas | $250 |  | $124
Entergy Louisiana | $450 |  | $—
Entergy Mississippi | $175 |  | $75
Entergy New Orleans | $150 |  | $—
Entergy Texas | $200 |  | $—
System Energy | $200 |  | $—
Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel | To finance the acquisition and ownership of nuclear fuel, the nuclear fuel company VIEs have credit facilities and three of the four VIEs also issued commercial paper as of March 31, 2018 as follows:
Company |  | Expiration Date |  | Amount of Facility |  | Weighted Average Interest Rate on Borrowings (a) |  | Amount Outstanding as of March 31, 2018
|  |  |  | (Dollars in Millions)
Entergy Arkansas VIE |  | May 2019 |  | $80 |  | 3.74% |  | $43.9 (b)
Entergy Louisiana River Bend VIE |  | May 2019 |  | $105 |  | 2.82% |  | $52.3
Entergy Louisiana Waterford VIE |  | May 2019 |  | $85 |  | 3.35% |  | $62.9 (b)
System Energy VIE |  | May 2019 |  | $120 |  | 3.46% |  | $43.2 (b)
(a) | Includes letter of credit fees and bank fronting fees on commercial paper issuances by the nuclear fuel company variable interest entities for Entergy Arkansas, Entergy Louisiana, and System Energy. The nuclear fuel company variable interest entity for Entergy Louisiana River Bend does not issue commercial paper, but borrows directly on its bank credit facility.
(b) | The total amount outstanding as of March 31, 2018 is commercial paper, and is classified as a current liability.
Notes Payable By Variable Interest Entities | The nuclear fuel company variable interest entities had notes payable that are included in debt on the respective balance sheets as of March 31, 2018 as follows:
Company |  | Description |  | Amount
Entergy Arkansas VIE |  | 3.65% Series L due July 2021 |  | $90 million
Entergy Arkansas VIE |  | 3.17% Series M due December 2023 |  | $40 million
Entergy Louisiana River Bend VIE |  | 3.38% Series R due August 2020 |  | $70 million
Entergy Louisiana Waterford VIE |  | 3.92% Series H due February 2021 |  | $40 million
Entergy Louisiana Waterford VIE |  | 3.22% Series I due December 2023 |  | $20 million
System Energy VIE |  | 3.78% Series I due October 2018 |  | $85 million
System Energy VIE |  | 3.42% Series J due April 2021 |  | $100 million
Book Value And The Fair Value Of Long-Term Debt | The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of March 31, 2018 are as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $16,851,636 |  |  |  | $16,771,585 |
Entergy Arkansas |  | $2,978,569 |  |  |  | $2,812,019 |
Entergy Louisiana |  | $6,938,439 |  |  |  | $7,022,323 |
Entergy Mississippi |  | $1,270,399 |  |  |  | $1,252,877 |
Entergy New Orleans |  | $436,995 |  |  |  | $446,981 |
Entergy Texas |  | $1,562,555 |  |  |  | $1,603,892 |
System Energy |  | $601,582 |  |  |  | $576,121 |
(a) | The values exclude lease obligations of $34 million at System Energy and long-term DOE obligations of $184 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.
The book value and the fair value of long-term debt for Entergy Corporation and the Registrant Subsidiaries as of December 31, 2017 were as follows:
| Book Value of Long-Term Debt |  | Fair Value of Long-Term Debt (a) (b)
| (In Thousands)
Entergy |  | $15,075,266 |  |  |  | $15,367,453 |
Entergy Arkansas |  | $2,952,399 |  |  |  | $2,865,844 |
Entergy Louisiana |  | $6,144,071 |  |  |  | $6,389,774 |
Entergy Mississippi |  | $1,270,122 |  |  |  | $1,285,741 |
Entergy New Orleans |  | $436,870 |  |  |  | $455,968 |
Entergy Texas |  | $1,587,150 |  |  |  | $1,661,902 |
System Energy |  | $551,488 |  |  |  | $529,119 |
(a) | The values exclude the lease obligations of $34 million at System Energy and long-term DOE obligations of $183 million at Entergy Arkansas, and include debt due within one year.
(b) | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements herein.

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