Debt (Tables)

9 Months Ended

Sep. 30, 2011

Notes To Financial Statements [Abstract]

Schedule of Debt [Text Block]

AGL Capital Corporation, our wholly-owned finance subsidiary, provides for our ongoing financing needs through a commercial paper program, the issuance of various debt and hybrid securities and other financing arrangements. The following table provides maturity dates, year-to-date weighted-average interest rates and amounts outstanding for our various debt securities and facilities. For additional information on our debt see Note 7 in our Consolidated Financial Statements and related notes in Item 8 of our 2010 Form 10-K.

		September 30, 2011				September 30, 2010
In millions (except %)	Year(s) due		Weighted- average interest rate	Outstanding	Outstanding at December 31, 2010		Weighted- average interest rate	Outstanding
Short-term debt
Commercial paper	-		0.4%	$0	$732		0.4%	$674
Current portion of long-term debt	2012		8.3	15	300		7.1	300
Current portion of capital leases	2011-2012		4.9	2	1		4.9	1
Total short-term debt and current portion of long-term debt			0.8%	$17	$1,033		3.5%(1)	$975
Long-term debt - net of current portion
Senior notes	2013-2041		5.5%	$2,275	$1,275		5.5%	$1,275
Gas facility revenue bonds	2022-2033		1.1	200	200		5.3	40
Medium-term notes	2017-2027		7.8	181	196		7.8	196
Interest rate swaps fair value adjustment	2016		4.2	11	0		0	0
Capital leases	-		0	0	2		4.9	3
Unamortized debt premium (discount), net	-		0	20	(2)		0	(2)
Total long-term debt			5.1%	$2,687	$1,671		5.4% (2)	$1,512
Total debt			4.5%	$2,704	$2,704		4.9%	$2,487

(1) Excluding the $300 million of senior notes repaid in January 2011, the weighted-average short-term interest rate for the nine months ended September 30, 2010 was 0.4%.

(2) Including the $300 million of senior notes repaid in January 2011, the weighted-average long-term interest rate for the nine months ended September 30, 2010 was 5.6%.