Note 3 - Regulated Operations (Tables)

12 Months Ended

Dec. 31, 2013

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets [Table Text Block]

In millions	2013		2012
Regulatory assets
Recoverable regulatory infrastructure program costs	$	48	$	47
Recoverable ERC		45		38
Recoverable pension and retiree welfare benefit costs		9		19
Other		60		41
Total regulatory assets - current		162		145
Recoverable ERC		433		438
Recoverable pension and retiree welfare benefit costs		99		196
Recoverable regulatory infrastructure program costs		87		167
Long-term debt fair value adjustment		82		90
Other		36		53
Total regulatory assets - long-term		737		944
Total regulatory assets	$	899	$	1,089
Regulatory liabilities
Accrued natural gas costs	$	92	$	93
Bad debt over collection		41		37
Accumulated removal costs		27		16
Other		23		15
Total regulatory liabilities - current		183		161
Accumulated removal costs		1,445		1,393
Regulatory income tax liability		27		27
Unamortized investment tax credit		26		29
Bad debt over collection		17		17
Other		3		11
Total regulatory liabilities - long-term		1,518		1,477
Total regulatory liabilities	$	1,701	$	1,638

Environmental Exit Costs by Cost [Table Text Block]

In millions	# of sites		Probabilistic model cost estimates (2)						Engineering estimates (2)		Amount recorded		Expected costs over next 12 months		Cost recovery period
Illinois (1)		24	$	209		-	$	458	$	42	$	251	$	38			As incurred (3)
New Jersey		6		139		-		233		6		145		18		7	years (3)
Georgia and Florida		13		28		-		112		8		40		7		5	years
North Carolina		1			n/a					11		11		7			No recovery
Total		44	$	376		-	$	803	$	67	$	447	$	70

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

					Amount refunded in				Amount to be refunded in
In millions	Bad debt experience		Total refund		2012		2013		2014		2015
2013	$	21	$	42	$	-	$	-	$	25	$	17
2012		23		40		-		24		16		-
2011		31		32		19		13		-		-