Acquisitions	9 Months Ended
Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions	Acquisitions In September 2018, a Con Edison Development subsidiary agreed to purchase Sempra Solar Holdings, LLC, a Sempra Energy subsidiary, for $1,540 million, subject to closing adjustments, including working capital. Sempra Solar Holdings, LLC has ownership interests in 981 megawatts (AC) of operating renewable electric production projects, including its 379 megawatts (AC) share of projects in which its subsidiaries have a 50 percent ownership interest and Con Edison Development subsidiaries have the remaining ownership interests (see Note M), and certain development rights with respect to solar electric production and energy storage projects. Most of the operating projects that are not jointly-owned have tax equity investors to which a percentage of earnings, tax attributes and cash flows are allocated. Sempra Solar Holdings, LLC subsidiaries have $576 million of existing project debt, including project debt associated with their share of the jointly-owned projects. Con Edison Development subsidiaries have $506 million of existing project debt associated with their share of the jointly-owned projects. Con Edison has been accounting for the interests of Con Edison Development subsidiaries in the jointly-owned projects under the equity method. Upon the closing of the acquisition, Con Edison expects to account for these projects and the other projects acquired on a consolidated basis. The acquisition is subject to customary closing conditions, including, among other things, expiration or early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the approvals of the FERC and the U.S. Department of Energy. Several banks have committed to provide bridge financing for the acquisition, subject to certain customary conditions. Con Edison has guaranteed the obligations of the Con Edison Development subsidiary under the purchase and sale agreement for the acquisition, including the payment of the purchase price for the acquisition. See Note H.

Acquisitions

In September 2018, a Con Edison Development subsidiary agreed to purchase Sempra Solar Holdings, LLC, a Sempra Energy subsidiary, for $1,540 million, subject to closing adjustments, including working capital. Sempra Solar Holdings, LLC has ownership interests in 981 megawatts (AC) of operating renewable electric production projects, including its 379 megawatts (AC) share of projects in which its subsidiaries have a 50 percent ownership interest and Con Edison Development subsidiaries have the remaining ownership interests (see Note M), and certain development rights with respect to solar electric production and energy storage projects. Most of the operating projects that are not jointly-owned have tax equity investors to which a percentage of earnings, tax attributes and cash flows are allocated. Sempra Solar Holdings, LLC subsidiaries have $576 million of existing project debt, including project debt associated with their share of the jointly-owned projects. Con Edison Development subsidiaries have $506 million of existing project debt associated with their share of the jointly-owned projects. Con Edison has been accounting for the interests of Con Edison Development subsidiaries in the jointly-owned projects under the equity method. Upon the closing of the acquisition, Con Edison expects to account for these projects and the other projects acquired on a consolidated basis. The acquisition is subject to customary closing conditions, including, among other things, expiration or early termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the approvals of the FERC and the U.S. Department of Energy. Several banks have committed to provide bridge financing for the acquisition, subject to certain customary conditions. Con Edison has guaranteed the obligations of the Con Edison Development subsidiary under the purchase and sale agreement for the acquisition, including the payment of the purchase price for the acquisition. See Note H.