Retirement and Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Net periodic benefit cost for the Company's retirement benefit plans

	Pension						Postretirement
	March 31,						March 31,
	2013			2012			2013			2012
Components of net periodic benefit cost:
Service cost	$	10.1		$	8.8		$	0.8		$	0.7
Interest cost	34.0			37.8			5.7			7.2
Expected return on plan assets	(57.3		)	(55.2		)	(2.8		)	(2.8		)
Amortization of prior service cost	1.2			2.3			(0.1		)	(0.1		)
Amortization of net actuarial loss	29.2			21.2			1.7			1.1
Net periodic benefit cost	$	17.2		$	14.9		$	5.3		$	6.1