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Summary of Significant Accounting Policies and Other Matters (Tables) | 3 Months Ended
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Mar. 31, 2021
Accounting Policies [Abstract] |
Rollforward of Allowance for Credit Losses | The table below presents a rollforward by major portfolio segment type for the three months ended March 31, 2021 and 2020:
| For the Three Months Ended March 31,
| Con Edison | CECONY
| Accounts receivable - customers | Other receivables | Accounts receivable - customers | Other receivables
(Millions of Dollars) | 2021 | 2020 | 2021 | 2020 | 2021 | 2020 | 2021 | 2020
Allowance for credit losses |  |  |  |  |  |  |  |
Beginning Balance at January 1, | $148 | $70 | $7 | $4 | $138 | $65 | $4 | $3
Recoveries | 3 | 2 | — |  | — |  | 3 | 2 | — |  | — |
Write-offs | (21) | (18) | (1) | — |  | (20) | (18) | — |  | — |
Reserve adjustments | 51 | 21 | 1 | 1 | 50 | 21 | 1 | — |
Ending Balance March 31, | $181 | $75 | $7 | $5 | $171 | $70 | $5 | $3
Basic and Diluted Earnings Per Share | For the three months ended March 31, 2021 and 2020, basic and diluted EPS for Con Edison are calculated as follows:
| For the Three Months Ended March 31,
(Millions of Dollars, except per share amounts/Shares in Millions) | 2021 | 2020
Net income for common stock | $419 | $375
Weighted average common shares outstanding – basic | 342.2 | 333.6
Add: Incremental shares attributable to effect of potentially dilutive securities | 0.8 | 1.0
Adjusted weighted average common shares outstanding – diluted | 343.0 | 334.6
Net Income per common share – basic | $1.23 | $1.13
Net Income per common share – diluted | $1.22 | $1.12
Changes in Accumulated Other Comprehensive Income/(Loss) | For the three months ended March 31, 2021 and 2020, changes to accumulated other comprehensive income/(loss) (OCI) for Con Edison and CECONY are as follows:
| For the Three Months Ended March 31,
| Con Edison | CECONY
(Millions of Dollars) | 2021 | 2020 | 2021 | 2020
Beginning balance, accumulated OCI, net of taxes (a) | $(25) | $(19) | $(7) | $(6)
OCI before reclassifications, net of tax of $(1) for Con Edison in 2021 and 2020 | 2 |  | 4 | — |  | — |
Amounts reclassified from accumulated OCI related to pension plan liabilities, net of tax of $(1) for Con Edison in 2021 and 2020 (a)(b) | 2 |  | 1 | — |  | 1 |
Current period OCI, net of taxes | 4 |  | 5 | — |  | 1 |
Ending balance, accumulated OCI, net of taxes | $(21) | $(14) | $(7) | $(5)
(a) Tax reclassified from accumulated OCI is reported in the income tax expense line item of the consolidated income statement. (b)For the portion of unrecognized pension and other postretirement benefit costs relating to the Utilities, costs are recorded into, and amortized out of, regulatory assets and liabilities instead of OCI. The net actuarial losses and prior service costs recognized during the period are included in the computation of total periodic pension and other postretirement benefit costs. See Notes E and F.
Restrictions on Cash and Cash Equivalents | At March 31, 2021 and 2020, cash, temporary cash investments and restricted cash for Con Edison and CECONY were as follows:
| At March 31,
| Con Edison | CECONY
(Millions of Dollars) | 2021 | 2020 | 2021 | 2020
Cash and temporary cash investments | $76 | $1,395 | $30 | $1,303
Restricted cash (a) | 81 | 179 | — |  | — |
Total cash, temporary cash investments and restricted cash | $157 | $1,574 | $30 | $1,303
(a)Restricted cash included cash of the Clean Energy Businesses' renewable electric production project subsidiaries ($81 million and $179 million at March 31, 2021 and 2020, respectively) that, under the related project debt agreements, either is restricted until the various maturity dates of the project debt to being used for normal operating expenses and capital expenditures, debt service, and required reserves or was restricted as a result of the PG&E bankruptcy. During the pendency of the PG&E bankruptcy, cash was not distributed from the related projects to the Clean Energy Businesses. In July 2020, PG&E’s plan of reorganization became effective. In July 2020, the Clean Energy Businesses received previously restricted distributions and have resumed receiving distributions for all projects.
Schedule of Cash and Cash Equivalents | At March 31, 2021 and 2020, cash, temporary cash investments and restricted cash for Con Edison and CECONY were as follows:
| At March 31,
| Con Edison | CECONY
(Millions of Dollars) | 2021 | 2020 | 2021 | 2020
Cash and temporary cash investments | $76 | $1,395 | $30 | $1,303
Restricted cash (a) | 81 | 179 | — |  | — |
Total cash, temporary cash investments and restricted cash | $157 | $1,574 | $30 | $1,303
(a)Restricted cash included cash of the Clean Energy Businesses' renewable electric production project subsidiaries ($81 million and $179 million at March 31, 2021 and 2020, respectively) that, under the related project debt agreements, either is restricted until the various maturity dates of the project debt to being used for normal operating expenses and capital expenditures, debt service, and required reserves or was restricted as a result of the PG&E bankruptcy. During the pendency of the PG&E bankruptcy, cash was not distributed from the related projects to the Clean Energy Businesses. In July 2020, PG&E’s plan of reorganization became effective. In July 2020, the Clean Energy Businesses received previously restricted distributions and have resumed receiving distributions for all projects.

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