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Schedule I - Condensed Financial Information - Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net Income | $ 1,343 | $ 1,382 | $ 1,525
Change in Assets: |  |  |
Taxes receivable | 29 | 27 | 15
Other – net | 54 | (62) | 0
NET CASH FLOWS FROM OPERATING ACTIVITIES | 3,134 | 2,695 | 3,367
INVESTING ACTIVITIES |  |  |
NET CASH FLOWS USED IN INVESTING ACTIVITIES | (3,782) | (5,471) | (3,710)
FINANCING ACTIVITIES |  |  |
Net proceeds of short-term debt | (874) | 1,989 | (477)
Issuance of long-term debt | 3,017 | 3,030 | 1,697
Retirement of long-term debt | (1,195) | (1,938) | (434)
Debt issuance costs | (32) | (61) | (19)
Issuance of common shares for stock plans | 54 | 53 | 51
Issuance of common shares - public offering | 825 | 705 | 343
Common stock dividends | (924) | (842) | (803)
NET CASH FLOWS FROM FINANCING ACTIVITIES | 859 | 2,938 | 357
NET CHANGE FOR THE PERIOD | 211 | 162 | 14
BALANCE AT BEGINNING OF PERIOD | 1,006 | 844 | 830
BALANCE AT END OF PERIOD | 1,217 | 1,006 | 844
CECONY |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net Income | 1,250 | 1,196 | 1,104
Change in Assets: |  |  |
Other – net | 54 | (96) | 23
NET CASH FLOWS FROM OPERATING ACTIVITIES | 2,502 | 2,204 | 2,866
INVESTING ACTIVITIES |  |  |
NET CASH FLOWS USED IN INVESTING ACTIVITIES | (3,124) | (3,306) | (3,080)
FINANCING ACTIVITIES |  |  |
Net proceeds of short-term debt | (55) | 1,042 | (450)
Issuance of long-term debt | 1,300 | 2,740 | 1,200
Retirement of long-term debt | (475) | (1,836) | 0
Debt issuance costs | (21) | (30) | (15)
NET CASH FLOWS FROM FINANCING ACTIVITIES | 737 | 1,190 | 240
NET CHANGE FOR THE PERIOD | 115 | 88 | 26
BALANCE AT BEGINNING OF PERIOD | 818 | 730 | 704
BALANCE AT END OF PERIOD | 933 | 818 | 730
Parent Company |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net Income | 1,343 | 1,382 | 1,525
Equity in earnings of subsidiaries | (1,354) | (1,447) | (1,544)
Change in Assets: |  |  |
Special deposits | (3) | (8) | 0
Taxes receivable | 25 | 2 | 34
Other – net | 44 | 187 | 21
NET CASH FLOWS FROM OPERATING ACTIVITIES | 1,029 | 1,033 | 896
INVESTING ACTIVITIES |  |  |
Contributions to subsidiaries | (930) | (1,110) | (434)
Debt receivable from affiliated companies | 450 | (825) | 0
NET CASH FLOWS USED IN INVESTING ACTIVITIES | (480) | (1,935) | (434)
FINANCING ACTIVITIES |  |  |
Net proceeds of short-term debt | (783) | 164 | (53)
Issuance of long-term debt | 825 | 825 | 400
Retirement of long-term debt | (553) | (3) | (402)
Debt issuance costs | 0 | 0 | (2)
Issuance of common shares for stock plans | 54 | 53 | 51
Issuance of common shares - public offering | 825 | 705 | 343
Common stock dividends | (924) | (842) | (803)
NET CASH FLOWS FROM FINANCING ACTIVITIES | (556) | 902 | (466)
NET CHANGE FOR THE PERIOD | (7) | 0 | (4)
BALANCE AT BEGINNING OF PERIOD | 9 | 9 | 13
BALANCE AT END OF PERIOD | 2 | 9 | 9
Parent Company | CECONY |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Dividends received | 912 | 846 | 796
Parent Company | O&R |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Dividends received | 47 | 46 | 44
Parent Company | Clean Energy Businesses |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Dividends received | 3 | 15 | 12
Parent Company | Con Edison Transmission |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Dividends received | $ 12 | $ 10 | $ 8

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