Note 3 - Regulated Operations (Tables)

12 Months Ended

Dec. 31, 2014

Note 3 - Regulated Operations (Tables) [Line Items]

Schedule of Regulatory Assets [Table Text Block]

In millions	2014		2013
Regulatory assets
Recoverable ERC	$	49	$	45
Recoverable pension and retiree welfare benefit costs		12		9
Recoverable seasonal rates		10		10
Deferred natural gas costs		3		1
Other		9		49
Total regulatory assets - current		83		114
Recoverable ERC		326		433
Recoverable pension and retiree welfare benefit costs		110		99
Long-term debt fair value adjustment		74		82
Recoverable regulatory infrastructure program costs		69		55
Other		52		36
Total regulatory assets - long-term		631		705
Total regulatory assets	$	714	$	819
Regulatory liabilities
Bad debt over collection	$	33	$	41
Accrued natural gas costs		27		92
Accumulated removal costs		25		27
Other		27		23
Total regulatory liabilities - current		112		183
Accumulated removal costs		1,520		1,445
Regulatory income tax liability		34		27
Unamortized investment tax credit		22		26
Bad debt over collection		12		17
Other		13		3
Total regulatory liabilities - long-term		1,601		1,518
Total regulatory liabilities	$	1,713	$	1,701

Environmental Exit Costs by Cost [Table Text Block]

In millions	# of sites		Probabilistic model cost estimates(1)	Engineering estimates(1)		Amount recorded			Expected costs over next 12 months		Cost recovery period
Illinois (2)		26	$205 - $462	$	30	$	230		$	41	As incurred
New Jersey		6	105 - 177		14		118			16	7 years
Georgia and Florida		13	40 - 81		15		56			21	5 years
North Carolina (3)		1	n/a		10		10			9	No recovery
Total		46	$350 - $720	$	69	$	414	(4)	$	87

Schedule of Valuation Allowance for Impairment of Recognized Servicing Assets [Table Text Block]

			Actual		Total		Amount refunded in				Amount to be refunded in
In millions	Benchmark		bad debt		refund		2013		2014		2015		2016
2014	$	63	$	35	$	28	$	-	$	-	$	16	$	12
2013		63		21		42		-		25		17		-
2012		63		23		40		24		16		-		-

Regulatory Asset Off Balance Sheet [Member]

Note 3 - Regulated Operations (Tables) [Line Items]

Schedule of Regulatory Assets [Table Text Block]

In millions	Atlanta Gas Light		Virginia Natural Gas		Elizabethtown Gas		Total
December 31, 2014	$	113	$	12	$	2	$	127
December 31, 2013		80		12		1		93