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Leases (Tables)
 3 Months Ended
Mar. 31, 2022
Leases [Abstract]  
Lease, Cost
The components of lease cost, included in Operation and maintenance expense on the Registrants’ respective Statements of Consolidated Income, are as follows:
Three Months Ended March 31, 2022Three Months Ended March 31, 2021
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease cost$2 $— $1 $2 $— $1 
Short-term lease cost46 46 — 10 10 — 
Variable lease cost(1)(1)— — — — 
Total lease cost (1)
$47 $45 $1 $12 $10 $1 
(1) CenterPoint Energy and Houston Electric defer finance lease costs for mobile generation to Regulatory assets for recovery rather than to Depreciation and Amortization in the Statements of Consolidated Income.
Operating Lease, Lease Income
The components of lease income were as follows:
Three Months Ended March 31, 2022Three Months Ended March 31, 2021
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions)
Operating lease income$1 $— $1 $2 $— $1 
Variable lease income— — — — — — 
Total lease income$1 $— $1 $2 $— $1 
Supplemental Balance Sheet Information Related To Leases
Supplemental balance sheet information related to leases was as follows:
March 31, 2022December 31, 2021
CenterPoint EnergyHouston
Electric		CERCCenterPoint EnergyHouston
Electric		CERC
(in millions, except lease term and discount rate)
Assets:
Operating ROU assets (1)
$16 $1 $7 $22 $1 $12 
Finance ROU assets (2)
344 343 — 179 179 — 
Total leased assets$360 $344 $7 $201 $180 $12 
Liabilities:
Current operating lease liability (3)
$4 $— $2 $6 $1 $2 
Non-current operating lease liability (4)
12 1 5 17 — 11 
Total leased liabilities (5)
$16 $1 $7 $23 $1 $13 
Weighted-average remaining lease term (in years) - operating leases5.24.34.56.24.16.5
Weighted-average discount rate - operating leases3.20 %3.00 %3.52 %3.10 %2.86 %3.20 %
Weighted-average remaining lease term (in years) - finance leases7.37.3— 7.57.5— 
Weighted-average discount rate - finance leases2.21 %2.21 %— 2.21 %2.21 %— 

(1)Reported within Other assets in the Registrants’ respective Consolidated Balance Sheets.
(2)Reported within Property, Plant and Equipment in the Registrants’ respective Consolidated Balance Sheets. Finance lease assets are recorded net of accumulated amortization.
(3)Reported within Current other liabilities in the Registrants’ respective Consolidated Balance Sheets.
(4)Reported within Other liabilities in the Registrants’ respective Consolidated Balance Sheets.
(5)Finance lease liabilities were not material as of December 31, 2021 or 2020 and are reported within Other long-term debt in the Registrants’ respective Consolidated Balance Sheets when applicable.
Lessee, Operating Lease, Liability, Maturity
As of March 31, 2022, finance lease liabilities were not significant to the Registrants. As of March 31, 2022, maturities of operating lease liabilities were as follows:
CenterPoint
 Energy		Houston
 Electric		CERC
(in millions)
Remainder of 2022$4 $1 $1 
20234 — 2 
20243 — 2 
20252 — 1 
20262 — 1 
2027 and beyond3 — 1 
Total lease payments18 1 8 
Less: Interest2 — 1 
Present value of lease liabilities$16 $1 $7 
Lessor, Operating Lease, Payments to be Received, Maturity As of March 31, 2022, maturities of undiscounted operating lease payments to be received are as follows:
CenterPoint
 Energy		Houston
 Electric		CERC
(in millions)
Remainder of 2022$5 $1 $3 
20235 — 3 
20245 — 3 
20255 — 3 
20266 — 4 
20276 — 4 
2028 and beyond136 — 132 
Total lease payments to be received$168 $1 $152 
Other Information Related To Leases
Other information related to leases is as follows:
Three Months Ended March 31, 2022Three Months Ended March 31, 2021
CenterPoint
 Energy		Houston
Electric		CERCCenterPoint
 Energy		Houston
Electric		CERC
(in millions)
Operating cash flows from operating leases included in the measurement of lease liabilities$2 $— $1 $2 $— $1 
Financing cash flows from finance leases included in the measurement of lease liabilities171 171 — — — —