Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
2024	$ 67
2025	66
2026	66
2027	65
2028	60
All years thereafter	365
Total future minimum lease payments	689
Less: imputed interest	(144)
Total	545
Operating lease liabilities (current)	116	$ 103
Operating lease liabilities held for sale (current)	2
Operating lease liabilities (noncurrent)	429	$ 476
Operating lease liabilities held for sale (noncurrent)	5
Total	552
Finance Leases
2024	1
2025	0
2026	0
2027	0
2028	0
All years thereafter	1
Total future minimum lease payments	2
Less: imputed interest	0
Total	2
Other current liabilities	1
Other noncurrent liabilities	1
Total	$ 2
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	TOTAL CURRENT LIABILITIES	TOTAL CURRENT LIABILITIES
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Liabilities, Other than Long-Term Debt, Noncurrent	Liabilities, Other than Long-Term Debt, Noncurrent
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities, Other than Long-Term Debt, Noncurrent, Other Liabilities	Liabilities, Other than Long-Term Debt, Noncurrent, Other Liabilities
Broken Bow II
Operating Leases
2024	$ 3
2025	3
2026	3
2027	3
2028	3
All years thereafter	10
Less: imputed interest	(6)
Operating lease liabilities (current)	7
CECONY
Operating Leases
2024	66
2025	66
2026	66
2027	65
2028	60
All years thereafter	365
Total future minimum lease payments	688
Less: imputed interest	(143)
Total	545
Operating lease liabilities (current)	116	$ 103
Operating lease liabilities held for sale (current)	0
Operating lease liabilities (noncurrent)	429	$ 475
Operating lease liabilities held for sale (noncurrent)	0
Total	545
Finance Leases
2024	1
2025	0
2026	0
2027	0
2028	0
All years thereafter	0
Total future minimum lease payments	1
Less: imputed interest	0
Total	1
Other current liabilities	1
Other noncurrent liabilities	0
Total	$ 1

Finance Lease, Liability, Including Held-For-Sale Amounts

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