Note 2 - Significant Accounting Policies and Methods of Application (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Schedule of Inventory Lower of Cost or Market Adjustment [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
In millions	2013		2012		2013		2012
Retail operations	$	1	$	-	$	1	$	3
Wholesale services		-		-		8		18
Midstream operations		-		-		-		1

Schedule of Regulatory Assets [Table Text Block]

In millions	September 30, 2013		December 31, 2012		September 30, 2012
Regulatory assets
Recoverable regulatory infrastructure program costs	$	46	$	47	$	46
Recoverable environmental remediation costs		30		38		33
Recoverable pension and retiree welfare benefit costs		19		19		27
Other regulatory assets		38		41		52
Total regulatory assets - current		133		145		158
Recoverable environmental remediation costs		456		438		421
Recoverable pension and retiree welfare benefit costs		183		196		228
Recoverable regulatory infrastructure program costs		104		167		194
Long-term debt fair value adjustment		84		90		92
Other regulatory assets		44		53		59
Total regulatory assets - long-term		871		944		994
Total regulatory assets	$	1,004	$	1,089	$	1,152
Regulatory liabilities
Accrued natural gas costs	$	104	$	93	$	62
Bad debt rider		37		37		30
Accumulated removal costs		17		16		14
Other regulatory liabilities		16		15		11
Total regulatory liabilities - current		174		161		117
Accumulated removal costs		1,448		1,393		1,381
Unamortized investment tax credit		26		29		30
Regulatory income tax liability		26		27		23
Bad debt rider		20		17		16
Other regulatory liabilities		4		11		15
Total regulatory liabilities - long-term		1,524		1,477		1,465
Total regulatory liabilities	$	1,698	$	1,638	$	1,582

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
In millions	2013		2012		2013		2012
Allowance for funds used during construction (AFUDC) - equity	$	3	$	2	$	9	$	4
Equity investment income (1)		3		2		8		10
Other, net		1		2		2		5
Total other income	$	7	$	6	$	19	$	19

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
In millions (except per share amounts)	2013		2012		2013		2012
Net income attributable to AGL Resources Inc.	$	28	$	9	$	231	$	173
Denominator:
Basic weighted average number of shares outstanding (1)		118.2		117.1		117.8		116.9
Effect of dilutive securities		0.3		0.4		0.3		0.4
Diluted weighted average number of shares outstanding		118.5		117.5		118.1		117.3
Earnings per share:
Basic	$	0.24	$	0.08	$	1.96	$	1.48
Diluted	$	0.24	$	0.08	$	1.96	$	1.48

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

In millions
Current assets	$	5
PP&E		11
Goodwill		46
Intangible assets		64
Current liabilities		(4	)
Total purchase price	$	122