Note 8 - Non-Wholly Owned Entities (Tables)

6 Months Ended

Jun. 30, 2012

Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block]

	June 30, 2012						December 31, 2011						June 30, 2011
In millions	Consolidated		SouthStar (1)		% (2)		Consolidated		SouthStar (1)		% (2)		Consolidated		SouthStar (1)		% (2)
Current assets	$	1,880	$	145	8	%	$	2,746	$	210	8	%	$	1,603	$	164	10	%
Long-term assets and other deferred debits		11,394		9	0			11,167		9	0			5,614		9	0
Total assets	$	13,274	$	154	1	%	$	13,913	$	219	2	%	$	7,217	$	173	2	%
Current liabilities	$	2,460	$	37	2	%	$	3,084	$	77	2	%	$	1,399	$	52	4	%
Long-term liabilities and other deferred credits		7,385		0	0			7,490		0	0			3,904		0	0
Total Liabilities		9,845		37	0			10,574		77	1			5,303		52	1
Equity		3,429		117	3			3,339		142	4			1,914		121	6
Total liabilities and equity	$	13,274	$	154	1	%	$	13,913	$	219	2	%	$	7,217	$	173	2	%

Schedule of Variable Interest Entities [Table Text Block]

	Three months ended June 30,				Six months ended June 30,
In millions	2012		2011		2012		2011
Operating revenues	$	99	$	116	$	314	$	406
Operating expenses
Cost of goods sold		80		100		213		300
Operation and maintenance		12		14		31		34
Depreciation and amortization		1		0		1		1
Taxes other than income taxes		1		1		2		1
Total operating expenses		94		115		247		336
Operating income	$	5	$	1	$	67	$	70