Note 5 - Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

	December 31,
In Bcf (1)	2013 (2)			2012
Hedge designation
Cash flow hedges		6			6
Not designated as hedges		183			96
Total hedges		189			102
Hedge position
Short position		(2,622	)		(1,955	)
Long position		2,811			2,057
Net long position		189			102

Loss Recognized In Income [Table Text Block]

In millions	2013			2012
Nicor Gas	$	4		$	(35	)
Elizabethtown Gas	$	(6	)	$	(28	)

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		December 31, 2013						December 31, 2012
In millions	Classification	Assets			Liabilities			Assets			Liabilities
Designated as cash flow hedges and fair value hedges
Natural gas contracts	Current	$	3		$	(1	)	$	1		$	(2	)
Interest rate swap agreements	Current		-			-			3			-
Total			3			(1	)		4			(2	)
Not designated as cash flow hedges
Natural gas contracts	Current		691			(761	)		394			(355	)
Natural gas contracts	Long-term		206			(220	)		45			(50	)
Total			897			(981	)		439			(405	)
Gross amount of recognized assets and liabilities (1)			900			(982	)		443			(407	)
Gross amounts offset in our Consolidated Statements of Financial Position(2)			(781	)		902			(299	)		368
Net amounts of assets and liabilities presented in ourConsolidated Statements of Financial Position (3)		$	119		$	(80	)	$	144		$	(39	)

Schedule of Derivative Instruments [Table Text Block]

In millions	2013			2012			2011
Designated as cash flow hedges
Natural gas contracts - loss reclassified from OCI to cost of goods sold	$	(1	)	$	(5	)	$	(6	)
Interest rate swaps – gain (loss) reclassified from OCI to interest expense		(3	)		(4	)		2
Income tax benefit		1			3			1
Net of tax		(3	)		(6	)		(3	)
Not designated as hedges
Natural gas contracts - net fair value adjustments recorded in operating revenues (1)		(90	)		34			40
Natural gas contracts - net fair value adjustments recorded in cost of goods sold (2)		2			(4	)		(4	)
Income tax benefit (expense)		34			(11	)		(14	)
Net of tax		(54	)		19			22
Total (losses) gains on derivative instruments, net of tax	$	(57	)	$	13		$	19