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STATEMENTS OF CONSOLIDATED CASH FLOWS - HOUSTON ELECTRIC - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash Flows from Operating Activities:      
Net income $ 1,019 $ 917 $ 1,057
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 1,439 1,401 1,288
Deferred income taxes 221 31 20
Changes in other assets and liabilities:      
Accounts receivable and unbilled revenues, net (84) 423 (461)
Inventory 42 167 (259)
Taxes receivable (27) (74) (19)
Accounts payable 210 (302) 203
Current regulatory assets and liabilities (86) 1,152 67
Non-current regulatory assets and liabilities (644) (109) 167
Other operating activities, net 14 60 79
Net cash provided by operating activities 2,139 3,877 1,810
Cash Flows from Investing Activities:      
Capital expenditures (4,513) (4,401) (4,419)
Other investing activities, net 24 24 14
Net cash provided by (used in) investing activities (4,489) (4,233) (1,628)
Cash Flows from Financing Activities:      
Proceeds from long-term debt and term loans, net 3,955 6,044 2,089
Payments of long-term debt (1,050) (3,190) (1,795)
Payment of debt issuance costs (35) (55) (36)
Payment of obligation for finance lease 0 0 (485)
Other financing activities, net (28) (25) (7)
Net cash provided by (used in) financing activities 2,271 374 (345)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash (79) 18 (163)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period 109 91 254
Cash, Cash Equivalents and Restricted Cash at End of Period 30 109 91
Houston Electric      
Cash Flows from Operating Activities:      
Net income 546 593 510
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 762 748 670
Deferred income taxes 61 160 86
Changes in other assets and liabilities:      
Accounts receivable and unbilled revenues, net (10) 16 (63)
Accounts receivable/payable–affiliated companies 25 (1) 47
Inventory 17 62 (179)
Taxes receivable 38 (38) 0
Accounts payable 89 (60) (7)
Current regulatory assets and liabilities 2 6 (20)
Non-current regulatory assets and liabilities (608) (136) (21)
Other current assets and liabilities 43 28 (20)
Other non-current assets and liabilities (8) 35 (25)
Other operating activities, net 3 (12) (12)
Net cash provided by operating activities 960 1,401 966
Cash Flows from Investing Activities:      
Capital expenditures (2,642) (2,279) (2,436)
Decrease (increase) in notes receivable–affiliated companies (130) (238) 0
Other investing activities, net 5 14 1
Net cash provided by (used in) investing activities (2,767) (2,503) (2,435)
Cash Flows from Financing Activities:      
Proceeds from long-term debt and term loans, net 1,397 1,398 1,589
Payments of long-term debt (161) (156) (720)
Increase (decrease) in notes payable–affiliated companies 0 (642) 130
Payment of debt issuance costs (8) (13) (17)
Contribution from parent 844 885 1,143
Dividend to parent (339) (367) (316)
Payment of obligation for finance lease 0 0 (485)
Other financing activities, net (1) (2) 0
Net cash provided by (used in) financing activities 1,732 1,103 1,324
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash (75) 1 (145)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period 89 88 233
Cash, Cash Equivalents and Restricted Cash at End of Period $ 14 $ 89 $ 88