Consolidated Income Statement - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING REVENUES
Total operating revenues	$ 12,246	$ 12,574	$ 12,337
OPERATING EXPENSES
Depreciation and amortization	1,920	1,684	1,438
Taxes, other than income taxes	2,575	2,406	2,266
TOTAL OPERATING EXPENSES	9,592	9,898	9,804
Gain on acquisition of Sempra Solar Holdings, LLC	0	0	131
OPERATING INCOME	2,654	2,676	2,664
OTHER INCOME (DEDUCTIONS)
Investment income (loss)	(214)	96	119
Other income	23	45	17
Allowance for equity funds used during construction	17	14	12
Other deductions	(227)	(104)	(210)
TOTAL OTHER INCOME (DEDUCTIONS)	(401)	51	(62)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,253	2,727	2,602
INTEREST EXPENSE
Interest on long-term debt	915	888	780
Other interest	118	116	49
Allowance for borrowed funds used during construction	(14)	(13)	(10)
NET INTEREST EXPENSE	1,019	991	819
INCOME BEFORE INCOME TAX EXPENSE	1,234	1,736	1,783
INCOME TAX EXPENSE	90	296	401
NET INCOME	1,144	1,440	1,382
Income attributable to non-controlling interest	43	97	0
NET INCOME FOR COMMON STOCK	$ 1,101	$ 1,343	$ 1,382
Net income per common share — basic (in dollars per share)	$ 3.29	$ 4.09	$ 4.43
Net income per common share — diluted (in dollars per share)	$ 3.28	$ 4.08	$ 4.42
AVERAGE NUMBER OF SHARES OUTSTANDING — BASIC (in shares)	334.8	328.5	311.7
AVERAGE NUMBER OF SHARES OUTSTANDING — DILUTED (in shares)	335.7	329.5	312.9
CECONY
OPERATING REVENUES
Total operating revenues	$ 10,647	$ 10,821	$ 10,680
OPERATING EXPENSES
Depreciation and amortization	1,598	1,373	1,276
Taxes, other than income taxes	2,456	2,295	2,156
TOTAL OPERATING EXPENSES	8,337	8,473	8,326
OPERATING INCOME	2,310	2,348	2,354
OTHER INCOME (DEDUCTIONS)
Investment income (loss)	19	40	13
Allowance for equity funds used during construction	14	12	11
Other deductions	(204)	(87)	(167)
TOTAL OTHER INCOME (DEDUCTIONS)	(171)	(35)	(143)
INCOME BEFORE INTEREST AND INCOME TAX EXPENSE	2,139	2,313	2,211
INTEREST EXPENSE
Interest on long-term debt	718	672	662
Other interest	33	67	36
Allowance for borrowed funds used during construction	(12)	(11)	(9)
NET INTEREST EXPENSE	739	728	689
INCOME BEFORE INCOME TAX EXPENSE	1,400	1,585	1,522
INCOME TAX EXPENSE	215	335	326
NET INCOME FOR COMMON STOCK	1,185	1,250	1,196
Electric
OPERATING REVENUES
Total operating revenues	8,730	8,694	8,612
Electric | CECONY
OPERATING REVENUES
Total operating revenues	8,103	8,062	7,971
Gas
OPERATING REVENUES
Total operating revenues	2,269	2,391	2,327
OPERATING EXPENSES
Operating costs	527	880	1,041
Gas | CECONY
OPERATING REVENUES
Total operating revenues	2,036	2,132	2,078
OPERATING EXPENSES
Operating costs	426	606	643
Steam
OPERATING REVENUES
Total operating revenues	508	627	631
Steam | CECONY
OPERATING REVENUES
Total operating revenues	508	627	631
Non-utility
OPERATING REVENUES
Total operating revenues	739	862	767
Purchased power
OPERATING EXPENSES
Operating costs	1,600	1,546	1,644
Purchased power | CECONY
OPERATING EXPENSES
Operating costs	1,432	1,357	1,433
Fuel
OPERATING EXPENSES
Operating costs	156	207	263
Fuel | CECONY
OPERATING EXPENSES
Operating costs	156	207	263
Other operations and maintenance
OPERATING EXPENSES
Operating costs	2,814	3,175	3,152
Other operations and maintenance | CECONY
OPERATING EXPENSES
Operating costs	$ 2,269	$ 2,635	$ 2,555