Note 8 - Equity (Tables)

6 Months Ended

Jun. 30, 2015

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	2015									2014
In millions (1)	Cash flow hedges			Retirement benefit plans			Total			Cash flow hedges			Retirement benefit plans			Total
For the three months ended June 30
As of beginning of period	$	(4	)	$	(197	)	$	(201	)	$	1		$	(136	)	$	(135	)
OCI, before reclassifications		25			-			25			-			-			-
Amounts reclassified from accumulated OCI		3			4			7			(1	)		3			2
Net current-period other comprehensive income (loss)		28			4			32			(1	)		3			2
As of end of period	$	24		$	(193	)	$	(169	)	$	-		$	(133	)	$	(133	)

For the six months ended June 30
As of beginning of period	$	(6	)	$	(200	)	$	(206	)	$	1		$	(137	)	$	(136	)
OCI, before reclassifications		27			-			27			4			-			4
Amounts reclassified from accumulated OCI		3			7			10			(5	)		4			(1	)
Net current-period other comprehensive income (loss)		30			7			37			(1	)		4			3
As of end of period	$	24		$	(193	)	$	(169	)	$	-		$	(133	)	$	(133	)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
In millions (1)	2015			2014			2015			2014
Cash flow hedges
Cost of goods sold (natural gas contracts)	$	(3	)	$	2		$	(4	)	$	5
Operation and maintenance expense (natural gas contracts)		(1	)		-			(1	)		1
Interest expense (interest rate contracts)		-			-			1			-
Total before income tax		(4	)		2			(4	)		6
Income tax benefit		-			(1	)		-			(1	)
Cash flow hedges, net of income tax		(4	)		1			(4	)		5
Less noncontrolling Interest		(1	)		-			(1	)		-
Total cash flow hedges, net of income tax		(3	)		1			(3	)		5
Retirement benefit plans
Operation and maintenance expense (actuarial losses) (2)		(6	)		(6	)		(11	)		(8	)
Operation and maintenance expense (prior service credits) (2)		-			1			-			1
Total before income tax		(6	)		(5	)		(11	)		(7	)
Income tax benefit		2			2			4			3
Total retirement benefit plans		(4	)		(3	)		(7	)		(4	)
Total reclassification for the period	$	(7	)	$	(2	)	$	(10	)	$	1