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Consolidated Balance Sheet (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
CURRENT ASSETS  
Cash and temporary cash investments$ 398$ 338
Accounts receivable - customers, less allowance for uncollectible accounts1,1771,173
Accrued unbilled revenue479633
Other receivables, less allowance for uncollectible accounts297293
Fuel oil, gas in storage, materials and supplies, at average cost375348
Prepayments469341
Regulatory assets110203
Other current assets153178
TOTAL CURRENT ASSETS3,4583,507
INVESTMENTS474403
UTILITY PLANT, AT ORIGINAL COST  
General1,9071,911
TOTAL29,14728,144
Less: Accumulated depreciation5,9615,808
Net23,18622,336
Construction work in progress1,4041,458
NET UTILITY PLANT24,59023,794
NON-UTILITY PLANT  
Non-utility property, less accumulated depreciation4746
Construction work in progress6123
NET PLANT24,69823,863
OTHER NONCURRENT ASSETS  
Goodwill429429
Intangible assets, less accumulated amortization of $3 in 2011 and 201033
Regulatory assets7,2067,683
Other deferred charges and noncurrent assets267298
TOTAL OTHER NONCURRENT ASSETS7,9058,413
TOTAL ASSETS36,53536,186
CURRENT LIABILITIES  
Long-term debt due within one year3055
Accounts payable1,0621,151
Customer deposits302289
Accrued taxes16690
Accrued interest212155
Accrued wages94102
Fair value of derivative liabilities101125
Regulatory liabilities257295
Other current liabilities460459
TOTAL CURRENT LIABILITIES2,9592,671
NONCURRENT LIABILITIES  
Obligations under capital leases27
Provision for injuries and damages180165
Pensions and retiree benefits2,6003,287
Superfund and other environmental costs496512
Asset retirement obligations114109
Fair value of derivative liabilities3077
Other noncurrent liabilities118113
TOTAL NONCURRENT LIABILITIES3,5404,270
DEFERRED CREDITS AND REGULATORY LIABILITIES  
Deferred income taxes and investment tax credits7,1106,602
Regulatory liabilities821652
Other deferred credits6946
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES8,0007,300
LONG-TERM DEBT10,36910,671
SHAREHOLDER'S EQUITY  
Common shareholders' equity (See Statement of Shareholders' Equity)11,45411,061
Preferred stock of subsidiary213213
TOTAL SHAREHOLDER'S EQUITY11,66711,274
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY36,53536,186
CECONY [Member] | Steam Plant [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost1,9602,038
Steam Plant [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost1,9602,038
CECONY [Member] | Electric Transmission [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost19,50818,735
Electric Transmission [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost20,71419,851
CECONY [Member] | Gas Transmission [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost4,0513,844
Gas Transmission [Member]
  
UTILITY PLANT, AT ORIGINAL COST  
Utility plant, at original cost4,5664,344
CECONY [Member]
  
CURRENT ASSETS  
Cash and temporary cash investments7078
Accounts receivable - customers, less allowance for uncollectible accounts1,0221,025
Accrued unbilled revenue358473
Other receivables, less allowance for uncollectible accounts8273
Accounts receivable from affiliated companies24273
Fuel oil, gas in storage, materials and supplies, at average cost304306
Prepayments38582
Regulatory assets90151
Other current assets90104
TOTAL CURRENT ASSETS2,4252,565
INVESTMENTS178167
UTILITY PLANT, AT ORIGINAL COST  
General1,7361,746
TOTAL27,25526,363
Less: Accumulated depreciation5,4435,314
Net21,81221,049
Construction work in progress1,3331,345
NET UTILITY PLANT23,14522,394
NON-UTILITY PLANT  
Non-utility property, less accumulated depreciation67
NET PLANT23,15122,401
OTHER NONCURRENT ASSETS  
Regulatory assets6,6687,097
Other deferred charges and noncurrent assets232244
TOTAL OTHER NONCURRENT ASSETS6,9007,341
TOTAL ASSETS32,65432,474
CURRENT LIABILITIES  
Long-term debt due within one year300 
Accounts payable836924
Accounts payable to affiliated companies1513
Customer deposits289276
Accrued taxes2734
Accrued taxes to affiliated companies2929
Accrued interest176130
Accrued wages9193
Fair value of derivative liabilities5171
Regulatory liabilities230267
Other current liabilities407400
TOTAL CURRENT LIABILITIES2,4512,237
NONCURRENT LIABILITIES  
Obligations under capital leases27
Provision for injuries and damages173159
Pensions and retiree benefits2,2592,900
Superfund and other environmental costs377392
Asset retirement obligations114109
Fair value of derivative liabilities929
Other noncurrent liabilities110102
TOTAL NONCURRENT LIABILITIES3,0443,698
DEFERRED CREDITS AND REGULATORY LIABILITIES  
Deferred income taxes and investment tax credits6,5396,071
Regulatory liabilities706547
Other deferred credits6542
TOTAL DEFERRED CREDITS AND REGULATORY LIABILITIES7,3106,660
LONG-TERM DEBT9,4449,743
SHAREHOLDER'S EQUITY  
Common shareholders' equity (See Statement of Shareholders' Equity)10,1929,923
Preferred stock of subsidiary213213
TOTAL SHAREHOLDER'S EQUITY10,40510,136
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY$ 32,654$ 32,474