Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
OPERATING ACTIVITIES
Net income	$ 602	$ 419
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	529	497
Deferred income taxes	167	77
Rate case amortization and accruals	18	(7)
Common equity component of allowance for funds used during construction	(5)	(5)
Unbilled revenue and net unbilled revenue deferrals	45	31
Other non-cash items, net	34	6
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(252)	(281)
Reserve adjustments	19	33
Materials and supplies, including fuel oil and gas in storage	33	17
Revenue decoupling mechanism receivable	(28)	(42)
Other receivables and other current assets	(198)	43
Prepayments	(471)	(500)
Accounts payable	(156)	(178)
Pensions and retiree benefits obligations, net	50	73
Pensions and retiree benefits contributions	(5)	(4)
Superfund and environmental remediation costs	(7)	(5)
Accrued taxes	(27)	(35)
Accrued interest	129	116
System benefit charge	(21)	(20)
Deferred charges, noncurrent assets and other regulatory assets	(214)	(42)
Deferred credits and other regulatory liabilities	440	50
Other current and noncurrent liabilities	(101)	(87)
NET CASH FLOWS FROM OPERATING ACTIVITIES	473	289
INVESTING ACTIVITIES
Utility construction expenditures	(837)	(868)
Cost of removal less salvage	(80)	(86)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(952)	(1,096)
FINANCING ACTIVITIES
Net issuance (repayment) of short-term debt	(175)	183
Debt issuance costs	(1)	(3)
NET CASH FLOWS USED IN FINANCING ACTIVITIES	(470)	(472)
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(949)	(1,279)
BALANCE AT BEGINNING OF PERIOD	1,146	1,436
BALANCE AT END OF PERIOD	197	157
Cash paid/(received) during the period for:
Interest	104	112
Income taxes	(1)	(15)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	424	390
Subsidiaries
OPERATING ACTIVITIES
Net income	475	465
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	446	415
Deferred income taxes	118	113
Rate case amortization and accruals	14	(9)
Common equity component of allowance for funds used during construction	(5)	(5)
Unbilled revenue and net unbilled revenue deferrals	49	53
Other non-cash items, net	34	(27)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(205)	(269)
Reserve adjustments	20	33
Materials and supplies, including fuel oil and gas in storage	27	10
Revenue decoupling mechanism receivable	(27)	(40)
Other receivables and other current assets	(150)	28
Accounts receivables from affiliated companies	6	(5)
Prepayments	(467)	(496)
Accounts payable	(129)	(117)
Accounts payable to affiliated companies	(1)	17
Pensions and retiree benefits obligations, net	43	72
Pensions and retiree benefits contributions	(4)	(4)
Superfund and environmental remediation costs	(8)	(7)
Accrued taxes	(6)	(35)
Accrued taxes to affiliated companies	(1)	0
Accrued interest	108	90
System benefit charge	(17)	(17)
Deferred charges, noncurrent assets and other regulatory assets	(193)	(34)
Deferred credits and other regulatory liabilities	397	47
Other current and noncurrent liabilities	(47)	(58)
NET CASH FLOWS FROM OPERATING ACTIVITIES	477	220
INVESTING ACTIVITIES
Utility construction expenditures	(794)	(818)
Cost of removal less salvage	(79)	(84)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(873)	(902)
FINANCING ACTIVITIES
Net issuance (repayment) of short-term debt	(300)	(233)
Debt issuance costs	(1)	0
Capital contribution by parent	75	125
Dividend to parent	(245)	(247)
NET CASH FLOWS USED IN FINANCING ACTIVITIES	(471)	(355)
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(867)	(1,037)
BALANCE AT BEGINNING OF PERIOD	920	1,067
BALANCE AT END OF PERIOD	53	30
Cash paid/(received) during the period for:
Interest	87	88
Income taxes	0	5
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	366	332
CECONY | Subsidiaries
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	446	415
Software Licenses
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	23	51
Software Licenses | Subsidiaries
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	22	48
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	22	28
Equipment | Subsidiaries
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	$ 22	$ 28