Income Taxes Income Taxes (Tax Cuts and Jobs Act) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Reduction to Regulatory Liability due to return of unprotected excess ADIT	$ 88	$ 74
Entergy Arkansas [Member]
Net Regulatory Liabilities for Income Taxes	432	467
Protected Excess ADIT	463	490
Unprotected Excess Accumulated Deferred Income Taxes	12	11
Reduction to Regulatory Liability due to return of unprotected excess ADIT	8	8
Entergy Louisiana [Member]
Net Regulatory Liabilities for Income Taxes	338	479
Protected Excess ADIT	669	721
Unprotected Excess Accumulated Deferred Income Taxes	148	223
Reduction to Regulatory Liability due to return of unprotected excess ADIT	33	31
Entergy Mississippi [Member]
Net Regulatory Liabilities for Income Taxes	212	224
Protected Excess ADIT	237	248
Entergy New Orleans [Member]
Net Regulatory Liabilities for Income Taxes	42	59
Protected Excess ADIT	56	61
Unprotected Excess Accumulated Deferred Income Taxes	0	3
Reduction to Regulatory Liability due to return of unprotected excess ADIT	1	6
Entergy Texas [Member]
Net Regulatory Liabilities for Income Taxes	171	205
Protected Excess ADIT	208	215
Unprotected Excess Accumulated Deferred Income Taxes	26	54
Reduction to Regulatory Liability due to return of unprotected excess ADIT	28	29
System Energy [Member]
Net Regulatory Liabilities for Income Taxes	113	152
Protected Excess ADIT	148	173
Unprotected Excess Accumulated Deferred Income Taxes	0	16
Reduction to Regulatory Liability due to return of unprotected excess ADIT	$ 18	$ 0