Note 15 - Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

In millions, except per share amounts	March 31			June 30		September 30			December 31
2014
Operating revenues	$	2,462		$	889	$	589		$	1,445
Operating income		592			139		78			286
EBIT		595			141		81			292
Income from continuing operations		346			59		23			152
Income from continuing operations attributable to AGL Resources Inc.		334			57		23			148
(Loss) income from discontinued operations, net of tax		(50	)		1		(31	)		-
Net income (loss) attributable to AGL Resources Inc.		284			58		(8	)		148
Basic earnings (loss) per common share:
Continuing operations		2.82			0.48		0.19			1.24
Discontinued operations		(0.43	)		0.01		(0.25	)		-
Diluted earnings (loss) per common share:
Continuing operations		2.81			0.48		0.19			1.24
Discontinued operations		(0.43	)		0.01		(0.25	)		-

2013
Operating revenues	$	1,612	$	805		$	574	$	1,218
Operating income		290		113			70		166
EBIT		295		119			77		164
Income from continuing operations		159		45			24		80
Income from continuing operations attributable to AGL Resources Inc.		149		44			24		73
Income (loss) from discontinued operations, net of tax		1		(1	)		1		4
Net income attributable to AGL Resources Inc.		150		43			25		77
Basic earnings (loss) per common share:
Continuing operations		1.27		0.38			0.20		0.61
Discontinued operations		0.01		(0.01	)		0.01		0.03
Diluted earnings (loss) per common share:
Continuing operations		1.26		0.38			0.20		0.61
Discontinued operations		0.01		(0.01	)		0.01		0.03