Segment and Related Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Financial data for business segments

Financial data for business segments and products and services for the three and nine months ended September 30, 2016 and 2015 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 September 30, 2016:
Operating revenues	$	5,236	$	500	$	(117	)	$	5,619	$	543	$	139		$	(37	)	$	6,264
Segment net income (loss)(a)(b)	1,018		176		—			1,194		4		(67		)	(1		)	1,130
Nine Months Ended September 30, 2016:
Operating revenues	$	13,120	$	1,189	$	(330	)	$	13,979	$	543	$	311		$	(118	)	$	14,715
Segment net income (loss)(a)(c)	2,076		315		—			2,391		4		(161		)	(8		)	2,226
Total assets at September 30, 2016	$	71,448	$	12,351	$	(440	)	$	83,359	$	21,185	$	2,974		$	(1,156	)	$	106,362
Three Months Ended September 30, 2015:
Operating revenues	$	5,098	$	401	$	(109	)	$	5,390	$	—	$	37		$	(26	)	$	5,401
Segment net income (loss)(a)(b)	874		102		—			976		—		(18		)	1			959
Nine Months Ended September 30, 2015:
Operating revenues	$	13,123	$	1,086	$	(322	)	$	13,887	$	—	$	120		$	(86	)	$	13,921
Segment net income (loss)(a)(c)	1,912		181		—			2,093		—		3			—			2,096
Total assets at December 31, 2015	$	69,052	$	8,905	$	(397	)	$	77,560	$	—	$	1,819		$	(1,061	)	$	78,318

(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 $88 million ($54 million after tax) and $150 million ($93 million after tax) for the three months ended September 30, 2016 and 2015, 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 includes pre-tax charges for estimated probable losses on the Kemper IGCC of $222 million ($137 million after tax) and $182 million ($112 million after tax) for the nine months ended September 30, 2016 and 2015, respectively. See Note (B) under "Integrated Coal Gasification Combined Cycle – Kemper IGCC Schedule and Cost Estimate" for additional information.

Financial data for products and services

Products and Services

	Electric Utilities' Revenues
Period	Retail		Wholesale		Other		Total
	(in millions)
Three Months Ended September 30, 2016	$	4,808	$	613	$	198	$	5,619
Three Months Ended September 30, 2015	4,701		520		169		5,390
Nine Months Ended September 30, 2016	$	11,932	$	1,455	$	592	$	13,979
Nine Months Ended September 30, 2015	11,958		1,435		494		13,887

	Southern Company Gas' Revenues
Period	Gas Distribution Operations		Gas Marketing Services		All Other			Total
	(in millions)
Three and Nine Months Ended September 30, 2016	$	420	$	126	$	(3	)	$	543