Note 5 - Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2013

Pension and Other Postretirement Benefits Disclosure [Text Block]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Three months ended June 30,						Six months ended June 30,
In millions	2013			2012			2013			2012
Service cost	$	7		$	7		$	15		$	14
Interest cost		11			11			21			22
Expected return on plan assets		(15	)		(16	)		(31	)		(32	)
Net amortization of prior service cost		(1	)		-			(1	)		(1	)
Recognized actuarial loss		9			8			17			17
Net periodic pension benefit cost	$	11		$	10		$	21		$	20

	Three months ended June 30,						Six months ended June 30,
In millions	2013			2012			2013			2012
Service cost	$	-		$	1		$	1		$	2
Interest cost		4			4			7			8
Expected return on plan assets		(2	)		(2	)		(3	)		(3	)
Net amortization of prior service cost		(1	)		-			(2	)		(1	)
Recognized actuarial loss		2			2			4			5
Net periodic welfare benefit cost	$	3		$	5		$	7		$	11