XML 227 R82.htm IDEA: XBRL DOCUMENT v3.22.4
Regulatory Matters - Narrative (Details)
$ in Millions
 12 Months Ended
Oct. 05, 2022
USD ($)
Jul. 01, 2022
USD ($)
Dec. 31, 2021
USD ($)
lease
Jan. 04, 2023
USD ($)
Dec. 31, 2022
USD ($)
Aug. 11, 2022
USD ($)
May 10, 2022
USD ($)
Dec. 22, 2021
USD ($)
Nov. 12, 2021
USD ($)
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     $ 3,716   $ 3,578        
Total current regulatory assets     1,395   1,385        
Total Non-Current Regulatory Assets     2,321   2,193        
Total Regulatory Liabilities     3,174   3,270        
Disallowance of regulatory asset         53        
February 2021 Winter Storm Event                  
Public Utilities, General Disclosures [Line Items]                  
Total current regulatory assets     1,410   1,175        
Total Non-Current Regulatory Assets     583   202        
Regulatory Liability, Amount Remaining Under Prudence Review         75        
Regulatory Liability, Approximate Total Gas Cost         2,000        
February 2021 Winter Storm Event | Arkansas and Oklahoma Natural Gas Businesses                  
Public Utilities, General Disclosures [Line Items]                  
Total current regulatory assets     154            
Total Non-Current Regulatory Assets     244            
February 2021 Winter Storm Event | Customer Rate Relief Bond Financing                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets                 $ 1,100
February 2021 Winter Storm Event | Authorized trackers and cost deferrals                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     15   16        
Natural Gas                  
Public Utilities, General Disclosures [Line Items]                  
Incremental uncollectible receivables, regulatory asset     29   17        
CERC Corp                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     2,309   2,180        
Total current regulatory assets     1,371   1,336        
Total Non-Current Regulatory Assets     938   844        
Total Regulatory Liabilities     1,716   1,826        
Incremental uncollectible receivables, regulatory asset     28            
CERC Corp | Minimum                  
Public Utilities, General Disclosures [Line Items]                  
Proposed disallowance of regulatory asset               $ 45  
CERC Corp | Maximum                  
Public Utilities, General Disclosures [Line Items]                  
Proposed disallowance of regulatory asset               $ 409  
CERC Corp | February 2021 Winter Storm Event                  
Public Utilities, General Disclosures [Line Items]                  
Total current regulatory assets     1,399   1,175        
Total Non-Current Regulatory Assets     583   202        
CERC Corp | February 2021 Winter Storm Event | Arkansas and Oklahoma Natural Gas Businesses                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets         398        
Total current regulatory assets     154            
Total Non-Current Regulatory Assets     244            
Houston Electric                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     789   778        
Total current regulatory assets     0   0        
Total Non-Current Regulatory Assets     789   778        
Total Regulatory Liabilities     $ 1,172   1,155        
Disallowance of regulatory asset         53        
Number of leases entered into | lease     2            
Houston Electric | February 2021 Winter Storm Event | Authorized trackers and cost deferrals                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     $ 15   $ 16        
IURC                  
Public Utilities, General Disclosures [Line Items]                  
Estimated qualified costs             $ 359    
Financed qualified costs             350    
Eatimated ongoing costs             $ 9    
Public Utility Commission of Texas                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     8            
Public Utility Commission of Texas | Houston Electric                  
Public Utilities, General Disclosures [Line Items]                  
Total Regulatory Assets     $ 8            
Minnesota Public Utility Commission | CERC Corp                  
Public Utilities, General Disclosures [Line Items]                  
Disallowance of regulatory asset           $ 36      
Public Utility Commission Of Texas | Houston Electric                  
Public Utilities, General Disclosures [Line Items]                  
Recovery of deferred costs sought   $ 200              
Annual revenue increase from lease agreements   $ 57              
Public Utility Commission Of Texas | Houston Electric | Minimum                  
Public Utilities, General Disclosures [Line Items]                  
Estimated financial impact $ 335                
Public Utility Commission Of Texas | Houston Electric | Maximum                  
Public Utilities, General Disclosures [Line Items]                  
Estimated financial impact $ 354                
Subsequent Event | IURC                  
Public Utilities, General Disclosures [Line Items]                  
Authorised issuance costs (up to)       $ 350