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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table represents the balance of asset retirement obligations as of December 31, 2022 and 2021, and changes to the obligation for the years then ended:
| Con Edison | CECONY
(Millions of Dollars) | 2022 | 2021 | 2022 | 2021
Beginning Balance as of January 1, | $577 |  | $577 |  | $504 |  | $508 |
ARO held for sale (a) | (77) |  | — |  | — |  | — |
Changes in estimated cash flows | 44 |  | 58 |  | 43 |  | 55 |
Accretion expense | 18 |  | 18 |  | 14 |  | 15 |
Liabilities settled | (62) |  | (75) |  | (62) |  | (74) |
Ending Balance as of December 31, (b) | $500 | $577 | $499 | $504
(a)The asset retirement obligations of the Clean Energy Businesses are reflected in current liabilities held for sale on Con Edison's consolidated balance sheet as of December 31, 2022. See "Assets and Liabilities Held for Sale" in Note A and Note X. (b)At December 31, 2022, Con Edison and CECONY recorded reductions of $78 million and $77 million, respectively, to the regulatory liability associated with cost of removal to reflect depreciation and interest expense. At December 31, 2021, Con Edison and CECONY recorded reductions of $87 million and $85 million, respectively, to the regulatory liability associated with cost of removal to reflect depreciation and interest expense.

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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