Note 3 - Merger with Nicor (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Purchase Price Allocation [Table Text Block]

In millions
Current assets	$	932
Property, plant and equipment		3,202
Goodwill		1,395
Other noncurrent assets, excluding goodwill		900
Current liabilities		(1,170	)
Long-term debt		(599	)
Other noncurrent liabilities		(2,157	)
Total purchase consideration	$	2,503

Business Acquisition, Pro Forma Information [Table Text Block]

In millions, except per share amounts	Twelve months ended December 31, 2011		Six months ended June 30, 2011
Total revenues	$	4,680	$	2,767
Net income attributable to AGL Resources Inc.	$	304	$	200
Basic earnings per common share	$	2.62	$	1.72
Diluted earnings per common share	$	2.61	$	1.71

Regulatory Assets and Liabilities [Member]

Schedule of Purchase Price Allocation [Table Text Block]

In millions
Current assets	$	36
Other noncurrent assets, excluding goodwill		586
Current liabilities		(80	)
Other noncurrent liabilities		(1,137	)