Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Operating revenues (includes revenue taxes of $56 for the three months in 2015 and $68 for the three months in 2014)	$ 1,721		$ 2,462
Operating expenses
Cost of goods sold	935		1,400
Operation and maintenance	249		289
Depreciation and amortization	97		93
Taxes other than income taxes	76		88
Total operating expenses	1,357		1,870
Operating income	364		592
Other income	3		3
Interest expense, net	(44)		(46)
Income before income taxes	323		549
Income tax expense	118		203
Income from continuing operations	205		346
(Loss) income from discontinued operations, net of tax			(50)
Net income	205		296
Less net income attributable to the noncontrolling interest	12		12
Net income attributable to AGL Resources Inc.	193		284
Amounts attributable to AGL Resources Inc.
Income from continuing operations attributable to AGL Resources Inc.	$ 193		$ 334
Basic earnings (loss) per common share
Continuing operations (in Dollars per share)	$ 1.62		$ 2.82
Discontinued operations (in Dollars per share)			$ (0.43)
Basic earnings per common share attributable to AGL Resources Inc. (in Dollars per share)	$ 1.62		$ 2.39
Diluted earnings (loss) per common share
Continuing operations (in Dollars per share)	$ 1.62	[1]	$ 2.81	[1]
Discontinued operations (in Dollars per share)		[1]	$ (0.43)	[1]
Diluted earnings per common share attributable to AGL Resources Inc. (in Dollars per share)	$ 1.62		$ 2.38
Cash dividends declared per common share (in Dollars per share)	$ 0.51		$ 0.49
Weighted average number of common shares outstanding
Basic (in Shares)	119.3	[2]	118.5	[2]
Diluted (in Shares)	119.6	[1]	118.9	[1]

[1] There were no outstanding stock options excluded from the computation of diluted earnings per common share attributable to AGL Resources Inc. for any of the periods presented because their effect would have been anti-dilutive as the exercise prices were greater than the average market price.

[2] Daily weighted average shares outstanding.