Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2017
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
Entergy Arkansas [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
Entergy Louisiana [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
Entergy Mississippi [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
Entergy New Orleans [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
Entergy Texas [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.
System Energy [Member]
Income Taxes	INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See “Income Tax Audits” and “Other Tax Matters” in Note 3 to the financial statements in the Form 10-K for a discussion of income tax audits and other income tax matters involving Entergy. The following are updates to that discussion. As discussed in the Form 10-K, in the second quarter 2016, Entergy made a tax election to treat as a corporation for federal income tax purposes its subsidiary that owned the FitzPatrick nuclear power plant. The effect of the election was that the plant and associated assets were deemed to be contributed to a new corporation for federal income tax purposes, which created permanent and temporary differences, as discussed in the Form 10-K. One permanent difference, which increased tax expense in 2016 under the applicable accounting standards, was the reduction to the plant’s tax basis to the extent that it exceeded its fair market value. Entergy sold the FitzPatrick plant on March 31, 2017. The removal of the contingencies regarding the sale of the plant and the receipt of NRC approval for the sale allowed Entergy to re-determine the plant’s tax basis, using the closing price as indicative of a higher fair market value for the plant. The re-determined basis resulted in a $44 million income tax benefit in the first quarter 2017. In the second quarter 2017, Entergy made tax elections to treat as corporations for federal income tax purposes two subsidiaries that each own an Entergy Wholesale Commodities nuclear power plant. This resulted in a constructive contribution of all the assets and liabilities associated with the plants to new subsidiary corporations for federal income tax purposes, and generated both permanent and temporary differences under the income tax accounting standards. The constructive contributions required the Entergy subsidiary that constructively contributed the assets and liabilities to recognize the plants’ nuclear decommissioning liabilities for income tax purposes resulting in permanent differences. The accrual of the nuclear decommissioning liabilities required Entergy to recognize a gain for income tax purposes, a portion of which resulted in an increase in tax basis of the assets constructively contributed to the subsidiaries. Recognition of the gain and the increase in tax basis of the assets represents a temporary difference. The permanent differences reduced income tax expense, net of unrecognized tax benefits, by $373 million. In the first quarter 2017, Entergy implemented ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” Entergy will now prospectively recognize all income tax effects related to share-based payments through the income statement. In the first quarter 2017, stock option expirations, along with other stock compensation activity, resulted in the write-off of $11.5 million of deferred tax assets. Entergy’s stock-based compensation plans are discussed in Note 12 to the financial statements in the Form 10-K.