Retirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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						Six Months Ended
	June 30,						June 30,
	2013			2012			2013			2012
Service cost	$	7.0		$	6.1		$	14.1		$	12.9
Interest cost		4.7			4.6			9.4			9.6
Expected return on plan assets		(8.9	)		(8.2	)		(17.8	)		(16.5	)
Settlement		—			0.7			—			0.7
Amortization of prior service cost		(0.9	)		(1.2	)		(1.9	)		(1.4	)
Amortization of unrecognized actuarial loss		4.6			3.3			9.3			6.7
Net periodic pension expense	$	6.5		$	5.3		$	13.1		$	12.0