Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net income	$ 1,346	$ 1,101	$ 1,343
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	2,032	1,920	1,684
Deferred income taxes	133	85	308
Rate case amortization and accruals	(16)	(40)	(116)
Common equity component of allowance for funds used during construction	(21)	(17)	(14)
Gain on Sale of Assets	0	0	(14)
Unbilled revenue and net unbilled revenue deferrals	(53)	(1)	(3)
Other non-cash items, net	148	49	(26)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers	(411)	(543)	23
Reserve adjustments	169	78	8
Materials and supplies, including fuel oil and gas in storage	(82)	(4)	6
Revenue decoupling mechanism receivable	(53)	(61)	(76)
Other receivables and other current assets	(103)	(134)	54
Prepayments	(24)	(11)	(73)
Accounts payable	44	170	10
Pensions and retiree benefits obligations, net	266	285	357
Pensions and retiree benefits contributions	(472)	(478)	(357)
Superfund and environmental remediation costs	(10)	(22)	(9)
Accrued taxes	(46)	74	10
Accrued interest	4	(4)	24
System benefit charge	(34)	(119)	20
Deferred charges, noncurrent assets and other regulatory assets	(563)	(653)	(492)
Deferred credits and other regulatory liabilities	175	10	278
Other current and noncurrent liabilities	36	60	(21)
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,733	2,198	3,134
INVESTING ACTIVITIES
Utility construction expenditures	(3,630)	(3,326)	(3,238)
Cost of removal less salvage	(323)	(310)	(295)
Proceeds from sale of assets	629	0	192
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(3,484)	(4,224)	(3,782)
FINANCING ACTIVITIES
Net (payment)/issuance of short-term debt	(382)	178	(874)
Issuance of long-term debt	2,804	2,925	3,017
Retirement of long-term debt	(1,960)	(518)	(1,195)
Debt issuance costs	(40)	(47)	(32)
NET CASH FLOWS FROM FINANCING ACTIVITIES	461	2,245	859
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(290)	219	211
BALANCE AT BEGINNING OF PERIOD	1,436	1,217	1,006
BALANCE AT END OF PERIOD	1,146	1,436	1,217
Cash paid/(received) during the period for:
Interest	924	920	876
Income taxes	9	38	(26)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	457	478	336
CECONY
OPERATING ACTIVITIES
Net income	1,344	1,185	1,250
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	1,705	1,598	1,373
Deferred income taxes	124	168	128
Rate case amortization and accruals	(16)	(40)	(117)
Common equity component of allowance for funds used during construction	(19)	(14)	(12)
Gain on Sale of Assets	0	0	(14)
Unbilled revenue and net unbilled revenue deferrals	(16)	(47)	(3)
Other non-cash items, net	33	(8)	0
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers	(412)	(516)	3
Reserve adjustments	166	74	7
Materials and supplies, including fuel oil and gas in storage	(78)	2	11
Revenue decoupling mechanism receivable	(62)	(53)	(76)
Other receivables and other current assets	(85)	(49)	54
Accounts receivables from affiliated companies	96	(61)	141
Prepayments	(53)	19	(61)
Accounts payable	65	145	(7)
Accounts payable to affiliated companies	(4)	9	(4)
Pensions and retiree benefits obligations, net	283	253	330
Pensions and retiree benefits contributions	(433)	(438)	(325)
Superfund and environmental remediation costs	(18)	(30)	(12)
Accrued taxes	(54)	61	11
Accrued taxes to affiliated companies	9	1	0
Accrued interest	1	13	1
System benefit charge	(32)	(112)	18
Deferred charges, noncurrent assets and other regulatory assets	(544)	(603)	(486)
Deferred credits and other regulatory liabilities	128	92	306
Other current and noncurrent liabilities	58	44	(14)
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,186	1,693	2,502
INVESTING ACTIVITIES
Utility construction expenditures	(3,413)	(3,112)	(3,028)
Cost of removal less salvage	(316)	(304)	(288)
Proceeds from sale of assets	0	0	192
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(3,729)	(3,416)	(3,124)
FINANCING ACTIVITIES
Net (payment)/issuance of short-term debt	(299)	523	(55)
Issuance of long-term debt	2,250	2,200	1,300
Retirement of long-term debt	(640)	(350)	(475)
Debt issuance costs	(27)	(34)	(21)
Capital contribution by parent	1,100	500	900
Dividend to parent	(988)	(982)	(912)
NET CASH FLOWS FROM FINANCING ACTIVITIES	1,396	1,857	737
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(147)	134	115
BALANCE AT BEGINNING OF PERIOD	1,067	933	818
BALANCE AT END OF PERIOD	920	1,067	933
Cash paid/(received) during the period for:
Interest	739	693	676
Income taxes	5	102	73
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	406	417	285
Software Licenses
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	23	51	80
Software Licenses | CECONY
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	22	48	76
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	22	28	33
Equipment | CECONY
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	$ 22	$ 28	$ 33