Pension and Other Post-Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2012

Pension and Other Post-Retirement Benefits [Abstract]

Components of pension and other post retirement benefit costs

	2012 Pension Benefits			2011 Pension Benefits			2012 Retiree Health and Life			2011 Retiree Health and Life
Service cost	$	1.5		$	1.2		$	—		$	0.1
Interest cost		5.0			5.2			0.5			0.6
Expected return on plan assets		(7.4	)		(8.3	)		—			—
Amortization of:
Unrecognized prior service credit		(0.2	)		(0.2	)		(0.1	)		(0.1	)
Unrecognized net actuarial loss (gains)		2.5			1.6			(0.1	)		(0.1	)
Net costs (a)	$	1.4		$	(0.5	)	$	0.3		$	0.5

	2012 Pension Benefits			2011 Pension Benefits			2012 Retiree Health and Life			2011 Retiree Health and Life
Service cost	$	3.0		$	2.7		$	0.1		$	0.1
Interest cost		9.9			10.4			1.0			1.1
Expected return on plan assets		(14.8	)		(16.6	)		—			—
Amortization of:
Unrecognized prior service credit		(0.5	)		(0.5	)		(0.1	)		(0.1	)
Unrecognized net actuarial loss (gain)		5.0			3.6			(0.1	)		(0.1	)
Net costs (a)	$	2.6		$	(0.4	)	$	0.9		$	1.0

(a) The amounts reported herein are based on estimated annual costs. Actual annual costs for the year ending December 31, 2012, may differ from these estimates.