Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2013

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

Net periodic benefit cost (income) for pension and other postretirement benefits were as follows:

	Three Months Ended March 31,
	2013			2012
Pension Benefits
Service cost	$	0.6		$	0.8
Interest cost	34.7			40.1
Expected return on assets	(45.9		)	(46.3		)
Amortization of prior service cost	0.9			1.1
Amortization of (gain) loss	6.8			6.1
Net periodic benefit cost (income)	$	(2.9	)	$	1.8
Other Postretirement Benefits
Service cost	$	1.2		$	1.1
Interest cost	5.3			7.9
Amortization of prior service cost (credit)	(20.0		)	(19.3		)
Amortization of (gain) loss	0.5			—
Net periodic benefit cost (income)	$	(13.0	)	$	(10.3	)