Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Operating revenues	$ 1,404		$ 878
Operating expenses
Cost of goods sold	719		455
Operation and maintenance	245		126
Depreciation and amortization	104		41
Taxes other than income taxes	64		13
Nicor merger expenses	10	[1]	5	[1]
Total operating expenses	1,142		640
Operating income	262		238
Other income	4		1
Interest expense, net	(47)		(29)
Earnings before income taxes	219		210
Income tax expense	80		76
Net income	139		134
Less net income attributable to the noncontrolling interest	9		10
Net income attributable to AGL Resources Inc.	$ 130		$ 124
Per common share data
Basic earnings per common share attributable to AGL Resources Inc. common shareholders (in Dollars per share)	$ 1.12		$ 1.60
Diluted earnings per common share attributable to AGL Resources Inc. common shareholders (in Dollars per share)	$ 1.11		$ 1.59
Cash dividends declared per common share (in Dollars per share)	$ 0.36		$ 0.45
Weighted average number of common shares outstanding
Basic (in Shares)	116.7	[2]	77.7	[2]
Diluted (in Shares)	117.0		78.0

[1] Transaction expenses associated with the Nicor merger are shown separately to better compare year-over-year results.

[2] Daily weighted average shares outstanding.