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Leases (Tables)
 9 Months Ended
Sep. 30, 2023
Leases [Abstract]  
Schedule of Lease Cost
The components of lease cost, included in Operation and maintenance expense on the Registrants’ respective Condensed Statements of Consolidated Income, are as follows:
Three Months Ended September 30, 2023Three Months Ended September 30, 2022
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease cost$1 $1 $— $2 $— $— 
Short-term lease cost15 14 — 39 39 1 
Total lease cost (1)
$16 $15 $— $41 $39 $1 
Nine Months Ended September 30, 2023Nine Months Ended September 30, 2022
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease cost$4 $2 $1 $4 $— $1 
Short-term lease cost28 27 — 123 122 1 
Total lease cost (1)
$32 $29 $1 $127 $122 $2 

(1) CenterPoint Energy and Houston Electric defer finance lease costs for TEEEF to Regulatory assets for recovery rather than recognizing Depreciation and Amortization in the Condensed Statements of Consolidated Income.
Schedule of Operating Lease Income
Lease income was as follows:
Three Months Ended September 30, 2023Three Months Ended September 30, 2022
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease income$2 $1 $1 $1 $1 $1 
Variable lease income— — — — — — 
Total lease income$2 $1 $1 $1 $1 $1 
Nine Months Ended September 30, 2023Nine Months Ended September 30, 2022
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease income$5 $1 $3 $4 $1 $2 
Variable lease income1 — — 1 — — 
Total lease income$6 $1 $3 $5 $1 $2 
Schedule of Supplemental Balance Sheet Information Related To Leases
Supplemental balance sheet information related to leases was as follows:
September 30, 2023December 31, 2022
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions, except lease term and discount rate)
Assets:
Operating ROU assets (1)
$15 $6 $4 $19 $6 $5 
Finance ROU assets (2)
550 550 — 621 621 — 
Total leased assets$565 $556 $4 $640 $627 $5 
Liabilities:
Current operating lease liability (3)
$4 $1 $1 $5 $1 $2 
Non-current operating lease liability (4)
11 5 3 14 5 4 
Total leased liabilities (5)
$15 $6 $4 $19 $6 $6 
Weighted-average remaining lease term (in years) - operating leases5.74.13.34.34.83.9
Weighted-average discount rate - operating leases3.94 %4.09 %3.60 %3.80 %4.01 %3.58 %
Weighted-average remaining lease term (in years) - finance leases5.85.8— 6.56.5— 
Weighted-average discount rate - finance leases3.60 %3.60 %— 3.60 %3.60 %— 

(1)Reported within Other assets in the Registrants’ respective Condensed Consolidated Balance Sheets.
(2)Reported within Property, Plant and Equipment in the Registrants’ respective Condensed Consolidated Balance Sheets. Finance lease assets are recorded net of accumulated amortization.
(3)Reported within Current other liabilities in the Registrants’ respective Condensed Consolidated Balance Sheets.
(4)Reported within Other liabilities in the Registrants’ respective Condensed Consolidated Balance Sheets.
(5)Finance lease liabilities were not significant as of June 30, 2023 or December 31, 2022 and are reported within Other long-term debt in the Registrants’ respective Condensed Consolidated Balance Sheets when applicable.
Schedule of Operating Lease Liability Maturity
As of September 30, 2023, finance lease liabilities were not significant to the Registrants. As of September 30, 2023, maturities of operating lease liabilities were as follows:
CenterPoint
 Energy		Houston
 Electric		CERC
(in millions)
Remainder of 2023$2 $— $1 
20243 2 2 
20253 2 1 
20263 2 1 
20272 1 — 
20282 — — 
2029 and beyond1 — — 
Total lease payments16 7 5 
Less: Interest1 1 1 
Present value of lease liabilities$15 $6 $4 
Schedule of Operating Lease Payments to be Received As of September 30, 2023, maturities of undiscounted operating lease payments to be received are as follows:
CenterPoint
 Energy		Houston
 Electric		CERC
(in millions)
Remainder of 2023$2 $— $1 
20246 1 5 
20258 1 5 
20268 — 5 
20277 — 5 
20287 — 5 
2029 and beyond173 — 170 
Total lease payments to be received$211 $2 $196 
Schedule of Other Information Related To Leases
Other information related to leases is as follows:
Three Months Ended September 30, 2023Three Months Ended September 30, 2022
CenterPoint
 Energy		Houston
Electric		CERCCenterPoint
 Energy		Houston
Electric		CERC
(in millions)
Operating cash flows from operating leases included in the measurement of lease liabilities$1 $— $— $1 $— $— 
Financing cash flows from finance leases included in the measurement of lease liabilities— — — 47 47 — 
Nine Months Ended September 30, 2023Nine Months Ended September 30, 2022
CenterPoint
 Energy		Houston
Electric		CERCCenterPoint
 Energy		Houston
Electric		CERC
(in millions)
Operating cash flows from operating leases included in the measurement of lease liabilities$4 $1 $1 $4 $— $1 
Financing cash flows from finance leases included in the measurement of lease liabilities— — — 218 218 —