Acquisitions and Dispositions (Tables)

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Schedule of Construction Projects

Project Facility	Resource	Approximate Nameplate Capacity (MW)	Location	Expected COD	PPA Contract Period
Mankato expansion(a)	Natural Gas	385	Mankato, MN	May 2019	20 years
Wildhorse Mountain(b)	Wind	100	Pushmataha County, OK	Fourth quarter 2019	20 years
Reading(c)	Wind	200	Osage and Lyon Counties, KS	Second quarter 2020	12 years

(a) In November 2018, Southern Power entered into an agreement to sell all of its equity interests in Plant Mankato, including this expansion currently under construction. This transaction is subject to FERC and state commission approvals and is expected to close mid-2019. The ultimate outcome of this matter cannot be determined at this time. See "Sales of Natural Gas and Biomass Plants" below.

(b) In May 2018, Southern Power purchased 100% of the Wildhorse Mountain facility. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.

(c) In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility from the joint development arrangement with Renewable Energy Systems Americas, Inc. described below. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the class B membership interests. The ultimate outcome of this matter cannot be determined at this time.

Disposal Groups, Including Discontinued Operations

Gulf Power and Southern Power's equity interests in Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) represented individually significant components of Southern Company and Southern Power, respectively; therefore, pre-tax profit for these components for the three months ended March 31, 2018 is presented below:

	For the Three Months Ended March 31, 2018
	(in millions)
Earnings before income taxes:
Gulf Power	$	55
Southern Power's Florida Plants	$	8

The following table provides Southern Company's and Southern Power's major classes of assets and liabilities classified as held for sale at March 31, 2019 and December 31, 2018:

	Southern Company		Southern Power
	(in millions)
At March 31, 2019
Assets Held for Sale:
Current assets	$	55	$	11
Total property, plant, and equipment	637		604
Goodwill and other intangible assets	82		40
Other non-current assets	44		—
Total Assets Held for Sale	$	818	$	655
Liabilities Held for Sale:
Current liabilities	$	38	$	9
Other non-current liabilities	39		—
Total Liabilities Held for Sale	$	77	$	9
At December 31, 2018
Assets Held for Sale:
Current assets	$	393	$	8
Total property, plant, and equipment	4,583		536
Goodwill and other intangible assets	40		40
Other non-current assets	727		—
Total Assets Held for Sale	$	5,743	$	584
Liabilities Held for Sale:
Current liabilities	$	425	$	15
Long-term debt	1,286		—
Accumulated deferred income taxes	618		—
Other non-current liabilities	932		—
Total Liabilities Held for Sale	$	3,261	$	15