Retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Components of Net Pension Expense

The components of net periodic pension expense for our U.S. and foreign defined benefit retirement plans are as follows (in millions):

	Three Months Ended March 31,
	2013			2012
Service cost	$	7.1		$	6.8
Interest cost		4.7			5.0
Expected return on plan assets		(8.9	)		(8.3	)
Amortization of prior service cost		(1.0	)		(0.2	)
Amortization of unrecognized actuarial loss		4.7			3.4
Net periodic pension expense	$	6.6		$	6.7