XML 228 R111.htm IDEA: XBRL DOCUMENT v3.24.0.1
Commitments and Contingencies - Purchase Obligations (Details)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
Natural Gas Supply  
Purchase Obligations  
2024 $ 684
2025 589
2026 502
2027 425
2028 380
2029 and beyond 1,707
Natural Gas Supply | CERC Corp  
Purchase Obligations  
2024 679
2025 585
2026 498
2027 422
2028 377
2029 and beyond 1,684
Electric Supply  
Purchase Obligations  
2024 145
2025 478
2026 342
2027 105
2028 68
2029 and beyond 737
Other  
Purchase Obligations  
2024 164
2025 45
2026 46
2027 4
2028 0
2029 and beyond $ 328
Other | Minimum | Capital Addition Purchase Commitments  
Purchase Obligations  
Purchase obligation term 15 years
Other | Maximum | Capital Addition Purchase Commitments  
Purchase Obligations  
Purchase obligation term 25 years