Joint Ownership Agreements (Tables)

12 Months Ended

Dec. 31, 2014

Jointly Owned Utility Plant Interests [Line Items]

Schedule of percentage ownership and investment in jointly-owned facilities

At December 31, 2014, Alabama Power's, Georgia Power's, and Southern Power's percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation with the above entities were as follows:



Facility (Type)	Percent Ownership		Plant in Service		Accumulated Depreciation		CWIP
			(in millions)
Plant Vogtle (nuclear) Units 1 and 2	45.7	%	$	3,420	$	2,059	$	46
Plant Hatch (nuclear)	50.1		1,117		559		66
Plant Miller (coal) Units 1 and 2	91.8		1,512		561		14
Plant Scherer (coal) Units 1 and 2	8.4		254		83		1
Plant Wansley (coal)	53.5		856		278		15
Rocky Mountain (pumped storage)	25.4		182		124		2
Intercession City (combustion turbine)	33.3		14		5		—
Plant Stanton (combined cycle) Unit A	65.0		157		47		—

Alabama Power [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of percentage ownership and investment in jointly-owned facilities

In addition to the Company's ownership of SEGCO and joint ownership of the natural gas pipeline, the Company's percentage ownership and investment in jointly-owned coal-fired generating plants at December 31, 2014 were as follows:



Facility	Total MW Capacity	Company Ownership			Plant in Service		Accumulated Depreciation		Construction Work in Progress
					(in millions)
Greene County	500	60.00	%	⁽¹⁾	$	164	$	96	$	1
Plant Miller
Units 1 and 2	1,320	91.84	%	⁽²⁾	1,512		561		14


(1)	Jointly owned with an affiliate, Mississippi Power.


(2)	Jointly owned with PowerSouth Energy Cooperative, Inc.

Georgia Power [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of percentage ownership and investment in jointly-owned facilities

At December 31, 2014, the Company's percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation with the above entities were as follows:



Facility (Type)	Company Ownership	Plant in Service		Accumulated Depreciation		CWIP
		(in millions)
Plant Vogtle (nuclear)
Units 1 and 2	45.7%	$	3,420	$	2,059	$	46
Plant Hatch (nuclear)	50.1	1,117		559		66
Plant Wansley (coal)	53.5	856		278		15
Plant Scherer (coal)
Units 1 and 2	8.4	254		83		1
Unit 3	75.0	1,172		417		10
Rocky Mountain (pumped storage)	25.4	182		124		2
Intercession City (combustion-turbine)	33.3	14		5		—

Gulf Power [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of percentage ownership and investment in jointly-owned facilities

At December 31, 2014, the Company's percentage ownership and investment in these jointly-owned facilities were as follows:



	Plant Scherer Unit 3 (coal)				Plant Daniel Units 1 & 2 (coal)
	(in thousands)
Plant in service	$	387,511		^(a)	$	285,834
Accumulated depreciation	130,069				177,304
Construction work in progress	2,912				286,343
Company Ownership	25		%		50		%


(a)	Includes net plant acquisition adjustment of $1.8 million.

Mississippi Power [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of percentage ownership and investment in jointly-owned facilities

At December 31, 2014, the Company's percentage ownership and investment in these jointly-owned facilities in commercial operation were as follows:



Generating Plant	Company Ownership		Plant in Service		Accumulated Depreciation		CWIP
			(in thousands)
Greene County
Units 1 and 2	40	%	$	102,384	$	51,911	$	902
Daniel
Units 1 and 2	50	%	$	299,440	$	155,606	$	286,240

- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

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