Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Net Periodic Benefit Cost for the Defined Benefit Pension Plan

The following table provides the components of net periodic benefit cost for the Plan (in millions):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
Interest cost	$	3.7		$	4.5		$	11.0		$	13.5
Expected return on plan assets	(5.2		)	(5.3		)	(15.6		)	(16.0		)
Amortization of actuarial loss	2.6			2.0			7.9			6.1
Net periodic benefit cost	$	1.1		$	1.2		$	3.3		$	3.6