Segment and Related Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Financial data for business segments

Financial data for business segments and products and services for the three months ended March 31, 2017 and 2016 was as follows:

	Electric Utilities
	Traditional Electric Operating Companies		Southern Power		Eliminations			Total		Southern Company Gas		All Other			Eliminations			Consolidated
	(in millions)
Three Months Ended March 31, 2017:
Operating revenues	$	3,786	$	450	$	(105	)	$	4,131	$	1,560	$	123		$	(43	)	$	5,771
Segment net income (loss)(a)(b)(c)	432		70		—			502		239		(84		)	1			658
Total assets at March 31, 2017	$	72,692	$	14,681	$	(306	)	$	87,067	$	21,683	$	2,574		$	(1,564	)	$	109,760
Three Months Ended March 31, 2016:
Operating revenues	$	3,769	$	315	$	(103	)	$	3,981	$	—	$	47		$	(36	)	$	3,992
Segment net income (loss)(a)(b)	465		50		—			515		—		(23		)	(3		)	489
Total assets at December 31, 2016	$	72,141	$	15,169	$	(316	)	$	86,994	$	21,853	$	2,474		$	(1,624	)	$	109,697

(a) Attributable to Southern Company.

(b) Segment net income (loss) for the traditional electric operating companies includes pre-tax charges for estimated probable losses on the Kemper IGCC of $108 million ($67 million after tax) and $53 million ($33 million after tax) for the three months ended March 31, 2017 and 2016, respectively. See Note (B) under "Integrated Coal Gasification Combined Cycle – Kemper IGCC Schedule and Cost Estimate" for additional information.

(c) Segment net income (loss) for the traditional electric operating companies also includes a pre-tax charge for the write-down of Gulf Power's ownership of Plant Scherer Unit 3 of $33 million ($20 million after tax) for the three months ended March 31, 2017. See Note (B) under "Regulatory Matters – Gulf Power – Retail Base Rate Cases" for additional information.

Business segment financial data for the successor period January 1, 2017 through March 31, 2017 and the predecessor period January 1, 2016 through March 31, 2016 was as follows:

	Gas Distribution Operations		Gas Marketing Services		Wholesale Gas Services(*)		Gas Midstream Operations			Total		All Other			Eliminations			Consolidated
	(in millions)
Successor – January 1, 2017 through March 31, 2017:
Operating revenues	$	1,180	$	288	$	131	$	25		$	1,624	$	2		$	(66	)	$	1,560
Segment net income	117		31		68		15			231		8			—			239
Successor – Total assets at March 31, 2017	$	18,201	$	2,118	$	1,018	$	2,363		$	23,700	$	10,860		$	(12,877	)	$	21,683
Predecessor – January 1, 2016 through March 31, 2016:
Operating revenues	$	1,028	$	286	$	63	$	15		$	1,392	$	2		$	(60	)	$	1,334
Segment EBIT	235		80		44		(1		)	358		(5		)	(1		)	352
Successor – Total assets at December 31, 2016	$	19,453	$	2,084	$	1,127	$	2,211		$	24,875	$	11,145		$	(14,167	)	$	21,853

(*) The revenues for wholesale gas services are netted with costs associated with its energy and risk management activities. A reconciliation of operating revenues and intercompany revenues is shown in the following table.

	Third Party Gross Revenues		Intercompany Revenues		Total Gross Revenues		Less Gross Gas Costs		Operating Revenues
	(in millions)
Successor – January 1, 2017 through March 31, 2017	$	1,839	$	136	$	1,975	$	1,844	$	131
Predecessor – January 1, 2016 through March 31, 2016	$	1,443	$	81	$	1,524	$	1,461	$	63

Financial data for products and services

Products and Services

	Electric Utilities' Revenues
Period	Retail		Wholesale		Other		Total
	(in millions)
Three Months Ended March 31, 2017	$	3,394	$	531	$	206	$	4,131
Three Months Ended March 31, 2016	3,377		396		208		3,981

	Southern Company Gas' Revenues
Period	Gas Distribution Operations		Gas Marketing Services		Other		Total
	(in millions)
Three Months Ended March 31, 2017	$	1,132	$	288	$	140	$	1,560