Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

9 Months Ended

Sep. 30, 2015

Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The components of Pension Expense for the nine and three months endedSeptember 30, 2015 and 2014 were:

	Nine Months Ended						Three Months Ended
(Dollars in Millions)	Sep 30, 2015			Sep 30, 2014			Sep 30, 2015			Sep 30, 2014
Service Cost Earned	$	7.9		$	6.5		$	2.7		$	2.1
Interest Cost on Projected Benefit Obligation	19.3			18.6			6.5			6.2
Expected Return on Plan Assets	(26.3		)	(26.2		)	(8.8		)	(8.7		)
Amortization of Accumulated Net Unrecognized Pension Costs	18.3			7.3			6.1			2.5
Total Pension Expense Recognized	$	19.2		$	6.2		$	6.5		$	2.1

Postretirement Benefits Other than Pensions [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The components of Postretirement Benefits Other than Pensions Expense (Benefit) for the nine and three months endedSeptember 30, 2015 and 2014 were:

	Nine Months Ended						Three Months Ended
(Dollars in Millions)	Sep 30, 2015			Sep 30, 2014			Sep 30, 2015			Sep 30, 2014
Service Cost on Benefits Earned	$	0.1		$	0.1		$	—		$	—
Interest Cost on Projected Benefit Obligation	0.8			0.9			0.3			0.3
Amortization of Accumulated Net Unrecognized Gain	(1.1		)	(1.4		)	(0.4		)	(0.5		)
Total Postretirement Benefits Other than Pensions Expense (Benefit)	$	(0.2	)	$	(0.4	)	$	(0.1	)	$	(0.2	)