Income Taxes (Summary of Operating Loss Carryforwards) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)
Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2028
Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2037
Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 4,400.0
After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 14,400.0
Entergy Arkansas [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2038
Entergy Arkansas [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
Entergy Arkansas [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy Arkansas [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 802.9
Entergy Louisiana [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2035
Tax Credit Carryforward, Expiration Date	Dec. 31, 2035
Entergy Louisiana [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2037
Tax Credit Carryforward, Expiration Date	Dec. 31, 2044
Entergy Louisiana [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 812.8
Entergy Louisiana [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 2,200.0
Entergy Mississippi [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2038
Entergy Mississippi [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
Entergy Mississippi [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy Mississippi [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy New Orleans [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2037
Entergy New Orleans [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037
Entergy New Orleans [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
Entergy New Orleans [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy New Orleans [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy Texas [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2039
Entergy Texas [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
Entergy Texas [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
Entergy Texas [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 1,400.0
System Energy [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2029
System Energy [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
System Energy [Member] | Before 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 0.0
System Energy [Member] | After 2018 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	357.1
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	4,300.0
Operating Loss Carryforwards, No Expiration	$ 9,000.0
State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2028
State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2042
State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 628.1
Tax Credit Carryforward, Amount	$ 0.0
State and Local Jurisdiction [Member] | Entergy Arkansas [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2028
State and Local Jurisdiction [Member] | Entergy Arkansas [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2032
State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 6,000.0
Tax Credit Carryforward, Amount	1.1
State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	0.0
Tax Credit Carryforward, Amount	$ 8.6
State and Local Jurisdiction [Member] | Entergy Mississippi [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2025
State and Local Jurisdiction [Member] | Entergy Mississippi [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2028
State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 181.3
Tax Credit Carryforward, Amount	0.0
State and Local Jurisdiction [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1.1
Tax Credit Carryforward, Amount	$ 0.6
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2028
State and Local Jurisdiction [Member] | Entergy Texas [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2027
State and Local Jurisdiction [Member] | Entergy Texas [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2033
State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 314.2
Tax Credit Carryforward, Amount	$ 19.0
State and Local Jurisdiction [Member] | System Energy [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2042
Tax Credit Carryforward, Expiration Date	Dec. 31, 2026
State and Local Jurisdiction [Member] | System Energy [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2045
Tax Credit Carryforward, Expiration Date	Dec. 31, 2028
Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 128.5
Tax Credit Carryforward, Amount	$ 413.3
Other Federal And State [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2026
Tax Credit Carryforward, Expiration Date	Dec. 31, 2026
Other Federal And State [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2030
Tax Credit Carryforward, Expiration Date	Dec. 31, 2045
Internal Revenue Service (IRS) [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 16.1
Internal Revenue Service (IRS) [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	24.5
Internal Revenue Service (IRS) [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	6.2
Internal Revenue Service (IRS) [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	17.4
Internal Revenue Service (IRS) [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	1.1
Internal Revenue Service (IRS) [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 6.3