Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
CURRENT ASSETS
Cash and temporary cash investments	$ 699		$ 674
Special deposits	8		327
Accounts receivable - customers, less allowance for uncollectible accounts	1,201		1,251
Other receivables, less allowance for uncollectible accounts	133		240
Income taxes receivable	224
Accrued unbilled revenue	500		514
Fuel oil, gas in storage, materials and supplies, at average cost	372		363
Prepayments	163		136
Regulatory assets	148		29
Deferred tax assets - current	128		122
Other current assets	278		235
TOTAL CURRENT ASSETS	3,854		3,891
INVESTMENTS	816		461
UTILITY PLANT AT ORIGINAL COST
General	2,465		2,336
TOTAL	35,909		33,474
Less: Accumulated depreciation	7,614		7,072
Net	28,295		26,402
Construction work in progress	1,031		1,393
NET UTILITY PLANT	29,326		27,795
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	388		605
Construction work in progress	113		36
NET PLANT	29,827		28,436
OTHER NONCURRENT ASSETS
Goodwill	429		429
Intangible assets, less accumulated amortization of $4 in 2014 and 2013	3		4
Regulatory assets	9,156		7,201
Other deferred charges and noncurrent assets	223		225
TOTAL OTHER NONCURRENT ASSETS	9,811		7,859
TOTAL ASSETS	44,308		40,647
CURRENT LIABILITIES
Long-term debt due within one year	560		485
Notes payable	800		1,451
Accounts payable	1,019		1,017
Customer deposits	344		321
Accrued taxes	72		476
Accrued interest	132		249
Accrued wages	95		92
Fair value of derivative liabilities	64		13
Regulatory liabilities	187		148
Other current liabilities	508		478
TOTAL CURRENT LIABILITIES	3,781		4,730
NONCURRENT LIABILITIES
Provision for injuries and damages	182		195
Pensions and retiree benefits	3,914		1,727
Superfund and other environmental costs	764		749
Asset retirement obligations	188		143
Fair value of derivative liabilities	13		5
Deferred income taxes and investment tax credits	9,076		8,466
Regulatory liabilities	1,993		1,728
Other deferred credits and noncurrent liabilities	181		170
TOTAL NONCURRENT LIABILITIES	16,311		13,183
LONG-TERM DEBT	11,631		10,489
EQUITY
COMMON SHAREHOLDER'S EQUITY (See Statement of Shareholder's Equity)	12,576		12,245
Noncontrolling interest	9
TOTAL EQUITY (See Statement of Equity)	12,585		12,245
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	44,308		40,647
CECONY [Member]
CURRENT ASSETS
Cash and temporary cash investments	645		633
Special deposits	2		86
Accounts receivable - customers, less allowance for uncollectible accounts	1,064		1,123
Other receivables, less allowance for uncollectible accounts	71		127
Accrued unbilled revenue	384		405
Accounts receivable from affiliated companies	132		119
Fuel oil, gas in storage, materials and supplies, at average cost	312		300
Prepayments	126		102
Regulatory assets	132		26
Deferred tax assets - current	94		100
Other current assets	158		55
TOTAL CURRENT ASSETS	3,120		3,076
INVESTMENTS	271		247
UTILITY PLANT AT ORIGINAL COST
General	2,265		2,154
TOTAL	33,584		31,312
Less: Accumulated depreciation	6,970		6,469
Net	26,614		24,843
Construction work in progress	971		1,303
NET UTILITY PLANT	27,585		26,146
NON-UTILITY PLANT
Non-utility property, less accumulated depreciation	5		4
NET PLANT	27,590		26,150
OTHER NONCURRENT ASSETS
Goodwill	245		245
Regulatory assets	8,481		6,639
Other deferred charges and noncurrent assets	175		146
TOTAL OTHER NONCURRENT ASSETS	8,656		6,785
TOTAL ASSETS	39,637		36,258
CURRENT LIABILITIES
Long-term debt due within one year	350	[1]	475	[1]
Notes payable	450		1,210
Accounts payable	802		824
Accounts payable to affiliated companies	23		45
Customer deposits	330		308
Accrued taxes	46		46
Accrued taxes to affiliated companies	10		413
Accrued interest	117		139
Accrued wages	84		82
Fair value of derivative liabilities	48		12
Regulatory liabilities	142		107
Other current liabilities	415		385
TOTAL CURRENT LIABILITIES	2,817		4,046
NONCURRENT LIABILITIES
Provision for injuries and damages	176		180
Pensions and retiree benefits	3,493		1,453
Superfund and other environmental costs	666		644
Asset retirement obligations	185		143
Fair value of derivative liabilities	10		3
Deferred income taxes and investment tax credits	8,257		7,832
Regulatory liabilities	1,837		1,598
Other deferred credits and noncurrent liabilities	144		146
TOTAL NONCURRENT LIABILITIES	14,768		11,999
LONG-TERM DEBT	10,864	[1]	9,366	[1]
EQUITY
COMMON SHAREHOLDER'S EQUITY (See Statement of Shareholder's Equity)	11,188		10,847
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	39,637		36,258
Electric Transmission [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	25,091		23,450
Electric Transmission [Member] | CECONY [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	23,599		22,073
Gas [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	6,102		5,494
Gas [Member] | CECONY [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	5,469		4,891
Steam [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	2,251		2,194
Steam [Member] | CECONY [Member]
UTILITY PLANT AT ORIGINAL COST
Utility plant, at original cost	$ 2,251		$ 2,194

[1] Rates are to be reset weekly or by auction held every 35 days; December 31, 2014 rates shown.