Pension And Other Post-Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2012

Pension And Other Post-Retirement Benefits [Abstract]

Net Periodic Benefit Expense Related To Post-Retirement Plans

	Three Months Ended March 31,
	Pension Plans						Other Post-Retirement Plans
	2012			2011			2012		2011
Components of net periodic expense
Service cost	$	4.5		$	3.7		$	0.3	$	0.3
Interest cost		3.2			3.2			0.2		0.2
Expected return on plan assets		(3.1	)		(3.0	)		—		—
Amortization of net actuarial loss from earlier periods		2.5			1.1			0.1		—
Amortization of net prior service costs from earlier periods		0.2			0.2			—		—
Net periodic expense	$	7.3		$	5.2		$	0.6	$	0.5