Financing (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Line Items]

Scheduled maturities and redemptions of securities due within one year

A summary of scheduled maturities and redemptions of securities due within one year at December 31 was as follows:

	2014		2013
	(in millions)
Senior notes	$	2,375	$	428
Other long-term debt	775		12
Pollution control revenue bonds	152		—
Capitalized leases	31		29
Total	$	3,333	$	469

Credit arrangements with banks

At December 31, 2014, committed credit arrangements with banks were as follows:

	Expires												Executable Term Loans				Due Within One Year
Company	2015		2016		2017		2018		Total		Unused		One Year		Two Years		Term Out		No Term Out
	(in millions)								(in millions)				(in millions)				(in millions)
Southern Company	$	—	$	—	$	—	$	1,000	$	1,000	$	1,000	$	—	$	—	$	—	$	—
Alabama Power	228		50		—		1,030		1,308		1,308		58		—		58		170
Georgia Power	—		150		—		1,600		1,750		1,736		—		—		—		—
Gulf Power	80		165		30		—		275		275		50		—		50		30
Mississippi Power	135		165		—		—		300		300		25		40		65		70
Southern Power	—		—		—		500		500		488		—		—		—		—
Other	70		—		—		—		70		70		20		—		20		50
Total	$	513	$	530	$	30	$	4,130	$	5,203	$	5,177	$	153	$	40	$	193	$	320

Short-term borrowings

Details of short-term borrowings were as follows:

	Short-term Debt at the End of the Period
	Amount Outstanding		Weighted Average Interest Rate
	(in millions)
December 31, 2014:
Commercial paper	$	803	0.3	%
Short-term bank debt	—		—	%
Total	$	803	0.3	%
December 31, 2013:
Commercial paper	$	1,082	0.2	%
Short-term bank debt	400		0.9	%
Total	$	1,482	0.4	%

Alabama Power [Member]

Debt Disclosure [Line Items]

Credit arrangements with banks

At December 31, 2014, committed credit arrangements with banks were as follows:

Expires(a)										Executable Term-Loans				Due Within One Year
2015		2016		2018		Total		Unused		One Year		Two Years		Term Out		No Term Out
(in millions)
$	228	$	50	$	1,030	$	1,308	$	1,308	$	58	$	—	$	58	$	170

(a) No credit arrangements expire in 2017.

Georgia Power [Member]

Debt Disclosure [Line Items]

Scheduled maturities and redemptions of securities due within one year

A summary of scheduled maturities of long-term debt due within one year at December 31 was as follows:

	2014		2013
	(in millions)
Senior notes	$	1,050	$	—
Pollution control revenue bonds	98		—
Capital lease	6		5
Total	$	1,154	$	5

Credit arrangements with banks

At December 31, 2014, committed credit arrangements with banks were as follows:

Expires(a)
2016	2018	Total	Unused
(in millions)
$150	$1,600	$1,750	$1,736

(a) No credit arrangements expire in 2015 or 2017.

Short-term borrowings

Details of short-term borrowings outstanding were as follows:

	Short-term Debt at the End of the Period
	Amount Outstanding		Weighted Average Interest Rate
	(in millions)
December 31, 2014:
Commercial paper	$	156	0.3	%
December 31, 2013:
Commercial paper	$	647	0.2	%
Short-term bank debt	400		0.9	%
Total	$	1,047	0.5	%

Gulf Power [Member]

Debt Disclosure [Line Items]

Credit arrangements with banks

At December 31, 2014, committed credit arrangements with banks were as follows:

Expires										Executable Term-Loans				Due Within One Year
2015		2016		2017		Total		Unused		One Year		Two Years		Term Out		No Term Out
						(in millions)
$	80	$	165	$	30	$	275	$	275	$	50	$	—	$	50	$	30

Short-term borrowings

Details of short-term borrowings were as follows:

	Commercial Paper at the End of the Period
	Amount Outstanding		Weighted Average Interest Rate
	(in millions)
December 31, 2014	$	110	0.3%
December 31, 2013	$	136	0.2%

Mississippi Power [Member]

Debt Disclosure [Line Items]

Scheduled maturities and redemptions of securities due within one year

A summary of scheduled maturities and redemptions of securities due within one year at December 31, 2014 and 2013 was as follows:

	2014		2013
	(in millions)
Bank term loans	$	775.0	$	—
Revenue bonds	—		11.3
Capitalized leases	2.7		2.5
Outstanding at December 31	$	777.7	$	13.8

Credit arrangements with banks

At December 31, 2014, committed credit arrangements with banks were as follows:

Expires				Executable Term-Loans		Due Within One Year
2015	2016	Total	Unused	One Year	Two Years	Term Out	No Term Out
(in millions)
$135	$165	$300	$300	$25	$40	$65	$70

Southern Power [Member]

Debt Disclosure [Line Items]

Short-term borrowings

Details of short-term borrowings are shown below. The Company had no short-term borrowings in 2013.

	Commercial Paper at the End of the Period
	Amount Outstanding		Weighted Average Interest Rate
	(in millions)
December 31, 2014	$	195	0.4	%

Redeemable Preferred Stock [Member] | Alabama Power [Member]

Debt Disclosure [Line Items]

Redeemable preferred stock

Information for each outstanding series is in the table below:

Preferred/Preference Stock	Par Value/Stated Capital Per Share	Shares Outstanding	Redemption Price Per Share
4.92% Preferred Stock	$100	80,000	$103.23
4.72% Preferred Stock	$100	50,000	$102.18
4.64% Preferred Stock	$100	60,000	$103.14
4.60% Preferred Stock	$100	100,000	$104.20
4.52% Preferred Stock	$100	50,000	$102.93
4.20% Preferred Stock	$100	135,115	$105.00
5.83% Class A Preferred Stock	$25	1,520,000	Stated Capital
5.20% Class A Preferred Stock	$25	6,480,000	Stated Capital
5.30% Class A Preferred Stock	$25	4,000,000	Stated Capital
5.625% Preference Stock	$25	6,000,000	Stated Capital
6.450% Preference Stock	$25	6,000,000	*
6.500% Preference Stock	$25	2,000,000	*

* Prior to 10/01/2017: Stated Value Plus Make-Whole Premium; after 10/01/2017: Stated Capital