Note 6 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Pension plans									Welfare plans
Dollars in millions	2013			2012			2011			2013			2012			2011
Service cost	$	29		$	28		$	14		$	3		$	4		$	1
Interest cost		43			44			29			14			16			6
Expected return on plan assets		(62	)		(64	)		(33	)		(6	)		(5	)		(5	)
Net amortization of prior service credit		(2	)		(2	)		(2	)		(5	)		(3	)		(4	)
Recognized actuarial loss		35			34			14			8			9			2
Net periodic benefit cost	$	43		$	40		$	22		$	14		$	21		$	-
Assumptions used to determine benefit costs
Discount rate (1)		4.2	%		4.6	%		5.4	%		4.0	%		4.5	%		5.2	%
Expected return on plan assets (1)		7.8	%		8.4	%		8.5	%		7.8	%		8.5	%		8.2	%
Rate of compensation increase (1)		3.7	%		3.7	%		3.7	%		3.8	%		3.8	%		3.7	%
Pension band increase (2)		2.0	%		2.0	%		2.0	%		n/a			n/a			n/a

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension plans						Welfare plans
Dollars in millions	2013			2012			2013			2012
Change in plan assets
Fair value of plan assets, January 1,	$	837		$	754		$	77		$	67
Actual return on plan assets		134			101			16			10
Employee contributions		-			-			3			1
Employer contributions		1			42			19			17
Benefits paid		(65	)		(59	)		(23	)		(19	)
Medicare Part D reimbursements		-			-			1			1
Plan curtailment and settlements		-			(1	)		-			-
Fair value of plan assets, December 31,	$	907		$	837		$	93		$	77
Change in benefit obligation
Benefit obligation, January 1,	$	1,046		$	968		$	354		$	397
Service cost		29			28			3			4
Interest cost		43			44			14			17
Actuarial loss (gain)		(93	)		66			(26	)		(22	)
Plan amendments		-			-			-			(25	)
Medicare Part D reimbursements		-			-			1			1
Benefits paid		(65	)		(59	)		(23	)		(19	)
Employee contributions		-			-			3			1
Plan curtailment and settlements		-			(1	)		-			-
Benefit obligation, December 31,	$	960		$	1,046		$	326		$	354
Funded status at end of year	$	(53	)	$	(209	)	$	(233	)	$	(277	)
Amounts recognized in the Consolidated Statements of Financial Position consist of
Long-term asset	$	117		$	33		$	-		$	-
Current liability		(2	)		(2	)		-			(12	)
Long-term liability		(168	)		(240	)		(233	)		(265	)
Total liability at December 31,	$	(53	)	$	(209	)	$	(233	)	$	(277	)
Accumulated benefit obligation (1)	$	902		$	983			n/a			n/a
Assumptions used to determine benefit obligations
Discount rate		5.0	%		4.2	%		4.7	%		4.0	%
Rate of compensation increase		3.7	%		3.7	%		3.7	%		3.7	%
Pension band increase (2)		2.0	%		2.0	%		n/a			n/a

Schedule of Health Care Cost Trend Rates [Table Text Block]

	2013			2012
Health care cost trend rate assumed for next year		8.4	%		8.4	%
Ultimate rate to which the cost trend rate is assumed to decline		4.5	%		4.5	%
Year that reaches ultimate trend rate		2030			2030

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

In millions	Effect on service and interest cost		Effect on benefit obligation
1% Health care cost trend rate increase	$	-	$	15
1% Health care cost trend rate decrease		-		(13	)

Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]

	Net regulatory assets					Accumulated OCI						Total
In millions	Pension plans		Welfare plans			Pension plans			Welfare plans			Pension plans			Welfare plans
December 31, 2013:
Prior service credit	$	-	$	(20	)	$	(9	)	$	-		$	(9	)	$	(20	)
Net loss		61		60			210			30			271			90
Total	$	61	$	40		$	201		$	30		$	262		$	70
December 31, 2012:
Prior service cost (credit)	$	-	$	(24	)	$	(11	)	$	(2	)	$	(11	)	$	(26	)
Net loss		146		83			324			52			470			135
Total	$	146	$	59		$	313		$	50		$	459		$	109

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

	Net Regulatory Asset					Accumulated OCI					Total
In millions	Pension plans		Welfare plans			Pension plans			Welfare plans		Pension plans			Welfare plans
Amortization of prior service credit	$	-	$	(3	)	$	(2	)	$	-	$	(2	)	$	(3	)
Amortization of net loss		7		4			13			2		20			6

Schedule of Expected Benefit Payments [Table Text Block]

In millions	Pension plans		Welfare plans
2014	$	56	$	20
2015		60		20
2016		63		21
2017		66		22
2018		68		23
2019-2023		366		123