STATEMENTS OF CONSOLIDATED CASH FLOWS - HOUSTON ELECTRIC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net income (loss)	$ 1,486	$ (773)	$ 791
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,316	1,189	1,225
Deferred income taxes	213	(429)	69
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	(98)	90	226
Inventory	(140)	9	(52)
Accounts payable	175	2	(455)
Taxes receivable	81	24	(106)
Net regulatory assets and liabilities	(2,295)	(107)	(22)
Other operating activities, net	85	35	128
Net cash provided by operating activities	22	1,995	1,638
Cash Flows from Investing Activities:
Capital expenditures	(3,164)	(2,596)	(2,506)
Other investing activities, net	15	36	34
Net cash used in investing activities	(1,851)	(1,265)	(8,421)
Cash Flows from Financing Activities:
Proceeds from long-term debt	4,493	799	2,916
Payments of long-term debt, including make-whole premiums	(2,968)	(1,724)	(1,302)
Payment of obligation for finance lease	(179)	0	0
Other financing activities, net	(5)	(6)	(14)
Net cash provided by (used in) financing activities	1,916	(834)	2,776
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	87	(104)	(4,007)
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	167	271	4,278
Cash, Cash Equivalents and Restricted Cash at End of Year	254	167	271
Houston Electric
Cash Flows from Operating Activities:
Net income (loss)	381	334	356
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	642	560	648
Deferred income taxes	32	(42)	(24)
Changes in other assets and liabilities, excluding acquisitions:
Accounts receivable and unbilled revenues, net	(17)	(26)	38
Accounts receivable/payable–affiliated companies	(36)	47	(23)
Inventory	(97)	(48)	(12)
Accounts payable	66	28	13
Taxes receivable	0	0	5
Net regulatory assets and liabilities	(237)	(11)	(48)
Other current assets and liabilities	39	55	(26)
Other assets and liabilities	6	4	(7)
Other operating activities, net	(9)	(2)	(2)
Net cash provided by operating activities	770	899	918
Cash Flows from Investing Activities:
Capital expenditures	(1,619)	(1,058)	(1,025)
(Increase) decrease in notes receivable–affiliated companies	0	481	(481)
Other investing activities, net	2	13	11
Net cash used in investing activities	(1,617)	(564)	(1,495)
Cash Flows from Financing Activities:
Proceeds from long-term debt	1,096	299	696
Payments of long-term debt, including make-whole premiums	(613)	(231)	(458)
Dividend to parent	0	(551)	(376)
Increase (decrease) in notes payable–affiliated companies	504	8	(1)
Payment of debt issuance costs	(12)	(3)	(8)
Contribution from parent	130	62	590
Payment of obligation for finance lease	(179)	0	0
Other financing activities, net	0	0	(1)
Net cash provided by (used in) financing activities	926	(416)	442
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	79	(81)	(135)
Cash, Cash Equivalents and Restricted Cash at Beginning of Year	154	235	370
Cash, Cash Equivalents and Restricted Cash at End of Year	$ 233	$ 154	$ 235