XML 289 R125.htm IDEA: XBRL DOCUMENT v3.25.0.1
Leases (Details)
$ in Millions
 12 Months Ended 24 Months Ended
Dec. 31, 2024
USD ($)
MW
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Lease, Cost [Abstract]        
Operating lease cost $ 6 $ 6 $ 6  
Short-term lease cost 12 31 167  
Total lease cost 18 37 173  
Operating Leases, Lease Income [Abstract]        
Operating lease income 7 6 5  
Variable lease income 1 2 2  
Total lease income 8 8 7  
Assets and Liabilities, Lessee [Abstract]        
Operating ROU assets 27 13    
Finance ROU assets 430 526    
Total leased assets 457 539    
Current operating lease liability 3 3    
Non-current operating lease liability 25 10    
Total leased liabilities $ 28 $ 13    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other non-current assets Other non-current assets    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, Plant and Equipment, Net Property, Plant and Equipment, Net    
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities Other current liabilities    
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other non-current liabilities Other non-current liabilities    
Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate [Abstract]        
Weighted-average remaining lease term (in years) - operating leases 17 years 8 months 12 days 4 years 8 months 12 days    
Weighted-average discount rate - operating leases 4.92% 4.13%    
Weighted-average remaining lease term (in years) - finance leases 4 years 6 months 5 years 6 months    
Weighted-average discount rate - finance leases 3.60% 3.60%    
Operating Lease Liabilities, Payments Due [Abstract]        
2025 $ 4      
2026 4      
2027 3      
2028 2      
2029 2      
Thereafter 30      
Total lease payments 45      
Less: Interest 17      
Present value of lease liabilities 28 $ 13    
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]        
2025 9      
2026 9      
2027 8      
2028 4      
2029 1      
Thereafter 1      
Total lease payments to be received 32      
Other Information Related to Leases [Abstract]        
Operating cash flows from operating leases included in the measurement of lease liabilities 5 5 6  
Financing cash flows from finance leases included in the measurement of lease liabilities 0 0 485  
Houston Electric        
Lease Disclosure [Line Items]        
Expenses associated with short-term lease $ 89 100    
Number of megawatts of mobile generation | MW 505      
Cash payment     485 $ 664
Escrow deposit $ 79      
Expenses associated with long term lease 158 124    
Lease, Cost [Abstract]        
Operating lease cost 3 3 1  
Short-term lease cost 11 30 166  
Total lease cost 14 33 167  
Operating Leases, Lease Income [Abstract]        
Operating lease income 0 1 1  
Variable lease income 0 0 0  
Total lease income 0 1 1  
Assets and Liabilities, Lessee [Abstract]        
Operating ROU assets 5 6    
Finance ROU assets 430 526    
Total leased assets 435 532    
Current operating lease liability 1 1    
Non-current operating lease liability 3 5    
Total leased liabilities $ 4 $ 6    
Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate [Abstract]        
Weighted-average remaining lease term (in years) - operating leases 2 years 10 months 24 days 3 years 10 months 24 days    
Weighted-average discount rate - operating leases 4.11% 4.09%    
Weighted-average remaining lease term (in years) - finance leases 4 years 6 months 5 years 6 months    
Weighted-average discount rate - finance leases 3.60% 3.60%    
Operating Lease Liabilities, Payments Due [Abstract]        
2025 $ 2      
2026 1      
2027 1      
2028 0      
2029 0      
Thereafter 0      
Total lease payments 4      
Less: Interest 0      
Present value of lease liabilities 4 $ 6    
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]        
2025 1      
2026 0      
2027 0      
2028 0      
2029 0      
Thereafter 0      
Total lease payments to be received 1      
Other Information Related to Leases [Abstract]        
Operating cash flows from operating leases included in the measurement of lease liabilities 2 2 1  
Financing cash flows from finance leases included in the measurement of lease liabilities 0 0 485  
CERC        
Lease, Cost [Abstract]        
Operating lease cost 2 2 2  
Short-term lease cost 0 0 1  
Total lease cost 2 2 3  
Operating Leases, Lease Income [Abstract]        
Operating lease income 5 4 3  
Variable lease income 0 0 0  
Total lease income 5 4 3  
Assets and Liabilities, Lessee [Abstract]        
Operating ROU assets 15 4    
Finance ROU assets 0 0    
Total leased assets 15 4    
Current operating lease liability 1 1    
Non-current operating lease liability 14 3    
Total leased liabilities $ 15 $ 4    
Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate [Abstract]        
Weighted-average remaining lease term (in years) - operating leases 20 years 7 months 6 days 3 years 1 month 6 days    
Weighted-average discount rate - operating leases 5.03% 3.60%    
Weighted-average discount rate - finance leases 0.00% 0.00%    
Operating Lease Liabilities, Payments Due [Abstract]        
2025 $ 2      
2026 2      
2027 1      
2028 1      
2029 1      
Thereafter 19      
Total lease payments 26      
Less: Interest 11      
Present value of lease liabilities 15 $ 4    
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]        
2025 6      
2026 6      
2027 7      
2028 2      
2029 0      
Thereafter 0      
Total lease payments to be received 21      
Other Information Related to Leases [Abstract]        
Operating cash flows from operating leases included in the measurement of lease liabilities 2 2 2  
Financing cash flows from finance leases included in the measurement of lease liabilities $ 0 $ 0 $ 0