Contract With Customer, Cost Of Program, Recovery Period

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- Definition

Contract With Customer, Receivable, Expected Amount

+ References

No definition available.

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- Definition

Earnings Adjustment Mechanism, Incentive Revenue

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- Definition

Revenue From Contract With Customer, Estimated Forgone Revenues

+ References

No definition available.

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- Definition

Amount of increase (decrease) in allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

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- Definition

Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer, when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044

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- Definition

The carrying amount of deferred costs.

+ References

No definition available.

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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(5))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Regulatory Matters - COVID-19 Regulatory Matters (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Public Utilities, General Disclosures [Line Items]
Increase in allowance for uncollectible accounts resulting from COVID-19 pandemic		$ 78.0
CECONY
Public Utilities, General Disclosures [Line Items]
Actual earnings adjustment mechanism incentives		46.0
Increase in allowance for uncollectible accounts resulting from COVID-19 pandemic		73.0
CECONY \| Electric
Public Utilities, General Disclosures [Line Items]
Actual earnings adjustment mechanism incentives		34.0	$ 43.0	$ 25.0	$ 13.0
O&R
Public Utilities, General Disclosures [Line Items]
Actual earnings adjustment mechanism incentives		3.0
COVID-19
Public Utilities, General Disclosures [Line Items]
Deferred costs	$ 0.5	0.5
COVID-19 \| CECONY
Public Utilities, General Disclosures [Line Items]
Estimated forgone revenues	61.0	3.0
COVID-19 \| CECONY \| Electric and Gas Transmission Projects
Public Utilities, General Disclosures [Line Items]
Reserve adjustments		73.0
Allowance for credit loss, write-off		18.0
COVID-19 \| O&R \| Gas
Public Utilities, General Disclosures [Line Items]
Reserve adjustments		2.0
Increase in allowance for uncollectible accounts resulting from COVID-19 pandemic		1.0
Allowance for credit loss, write-off		1.0
Residential Customers \| COVID-19 \| CECONY
Public Utilities, General Disclosures [Line Items]
Deferred revenue	54.9	$ 54.9
Summer Cooling Credit Program \| Residential Customers \| COVID-19 \| CECONY
Public Utilities, General Disclosures [Line Items]
Cost of the program, recovery period		5 years
Expected deferred revenue	$ 63.4	$ 63.4