Leases (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 1988
Operating Lease, Expense	$ 69,067,000	$ 67,471,000
Finance Lease, Right-of-Use Asset, Amortization	12,483,000	12,180,000
Finance Lease, Interest Expense	2,845,000	2,884,000
Short-term Lease, Cost	$ 2,800,000	$ 759,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Public Utilities, Property, Plant and Equipment, Plant in Service	Public Utilities, Property, Plant and Equipment, Plant in Service
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Public Utilities, Property, Plant and Equipment, Plant in Service	Public Utilities, Property, Plant and Equipment, Plant in Service
Entergy Arkansas [Member]
Operating Lease, Right-of-Use Asset	$ 56,099,000	$ 55,840,000
Finance Lease, Right-of-Use Asset	15,043,000	12,447,000
Operating Lease, Expense	15,087,000	14,344,000
Finance Lease, Right-of-Use Asset, Amortization	2,860,000	2,693,000
Finance Lease, Interest Expense	432,000	408,000
Short-term Lease, Cost	826,000	43,000
Entergy Louisiana [Member]
Operating Lease, Right-of-Use Asset	46,443,000	43,189,000
Finance Lease, Right-of-Use Asset	19,007,000	16,425,000
Operating Lease, Expense	14,368,000	13,944,000
Finance Lease, Right-of-Use Asset, Amortization	3,938,000	4,097,000
Finance Lease, Interest Expense	607,000	597,000
Short-term Lease, Cost	934,000	719,000
Entergy Mississippi [Member]
Operating Lease, Right-of-Use Asset	16,831,000	16,538,000
Finance Lease, Right-of-Use Asset	9,114,000	7,452,000
Operating Lease, Expense	7,018,000	6,584,000
Finance Lease, Right-of-Use Asset, Amortization	1,766,000	1,627,000
Finance Lease, Interest Expense	270,000	254,000
Short-term Lease, Cost	703,000
Entergy New Orleans [Member]
Operating Lease, Right-of-Use Asset	5,480,000	5,222,000
Finance Lease, Right-of-Use Asset	4,023,000	3,428,000
Operating Lease, Expense	1,745,000	1,443,000
Finance Lease, Right-of-Use Asset, Amortization	731,000	712,000
Finance Lease, Interest Expense	124,000	120,000
Short-term Lease, Cost	77,000
Entergy Texas [Member]
Operating Lease, Right-of-Use Asset	14,986,000	14,738,000
Finance Lease, Right-of-Use Asset	7,583,000	5,719,000
Operating Lease, Expense	5,370,000	4,870,000
Finance Lease, Right-of-Use Asset, Amortization	1,493,000	1,340,000
Finance Lease, Interest Expense	214,000	196,000
Short-term Lease, Cost	261,000
System Energy [Member] | Grand Gulf [Member]
Sale Leaseback Transaction, Net Book Value			$ 500,000,000
Regulatory Assets	0
Net regulatory liability related to sale and leaseback transaction	$ 55,600,000	$ 55,600,000