Note 10 - Non-Wholly Owned Entities (Tables)

12 Months Ended

Dec. 31, 2012

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

	December 31, 2012						December 31, 2011
In millions	Consolidated		SouthStar (1)		% (2)		Consolidated		SouthStar (1)		% (2)
Current assets	$	2,668	$	201	8	%	$	2,746	$	210	8	%
Long-term assets and other deferred debit		11,473		10	0			11,167		9	0
Total assets	$	14,141	$	211	1	%	$	13,913	$	219	2	%
Current liabilities	$	3,338	$	62	2	%	$	3,084	$	77	2	%
Long-term liabilities and other deferred credits		7,368		0	0			7,490		0	0
Total Liabilities		10,706		62	1			10,574		77	1
Equity		3,435		149	4			3,339		142	4
Total liabilities and equity	$	14,141	$	211	1	%	$	13,913	$	219	2	%

Schedule of Variable Interest Entities [Table Text Block]

	December 31,
In millions	2012		2011
Operating revenues	$	576	$	689
Operating expenses
Cost of goods sold		411		526
Operation and maintenance		63		67
Depreciation and amortization		2		2
Taxes other than income taxes		2		2
Total operating expenses		478		597
Operating income	$	98	$	92

Schedule of Equity Method Investments [Table Text Block]

In millions	2012		2011
Triton	$	73	$	76
Horizon Pipeline		17		18
Other		9		8
Total	$	99	$	102

Purchase Of Additional Ownership [Member]

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

In millions	Premium on common stock			Accumulated other comprehensive loss			Total
Purchase of additional 15% ownership interest	$	(51	)	$	(1	)	$	(52	)