Pension and Postretirement Benefit Costs (Tables)

3 Months Ended

Mar. 31, 2013

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

Pension and Postretirement Benefit Costs

Net periodic pension costs included the following components:

	Three Months Ended
	March 31,
	2013			2012
	(Dollars in millions)
Service cost for benefits earned	$	0.6		$	0.5
Interest cost on projected benefit obligation	10.6			11.7
Expected return on plan assets	(14.9		)	(15.9		)
Amortization of prior service cost	0.2			0.2
Amortization of actuarial loss	16.4			12.2
Net periodic pension costs	$	12.9		$	8.7

Annual contributions to the qualified plans are made in accordance with minimum funding standards and the Company's agreement with the Pension Benefit Guaranty Corporation (PBGC). Funding decisions also consider certain funded status thresholds defined by the Pension Protection Act of 2006 (generally 80%). The Company currently expects its qualified plans to be at or above the Pension Protection Act thresholds and will therefore avoid benefit restrictions and at-risk penalties for 2013. Based upon minimum funding requirements in accordance with the Moving Ahead for Progress in the 21st Century Act (MAP-21) issued in July 2012, the Company expects to contribute approximately $5.0 million in 2013 to meet minimum funding requirements for its qualified plans and benefit payments for its non-qualified plans.

Net periodic postretirement benefit costs included the following components:

	Three Months Ended
	March 31,
	2013			2012
	(Dollars in millions)
Service cost for benefits earned	$	3.9		$	3.6
Interest cost on accumulated postretirement benefit obligation	10.5			13.7
Amortization of prior service cost	(0.4		)	0.7
Amortization of actuarial loss	6.0			8.1
Net periodic postretirement benefit costs	$	20.0		$	26.1

Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension costs included the following components:

	Three Months Ended
	March 31,
	2013			2012
	(Dollars in millions)
Service cost for benefits earned	$	0.6		$	0.5
Interest cost on projected benefit obligation	10.6			11.7
Expected return on plan assets	(14.9		)	(15.9		)
Amortization of prior service cost	0.2			0.2
Amortization of actuarial loss	16.4			12.2
Net periodic pension costs	$	12.9		$	8.7

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic postretirement benefit costs included the following components:

	Three Months Ended
	March 31,
	2013			2012
	(Dollars in millions)
Service cost for benefits earned	$	3.9		$	3.6
Interest cost on accumulated postretirement benefit obligation	10.5			13.7
Amortization of prior service cost	(0.4		)	0.7
Amortization of actuarial loss	6.0			8.1
Net periodic postretirement benefit costs	$	20.0		$	26.1