Retirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Retirement Benefit Plans [Abstract]

Components of net pension expense

	Three Months						Six Months
	Ended						Ended
	June 30,						June 30,
	2011			2010			2011			2010
Service cost	$	7.2		$	6.2		$	14.1		$	12.5
Interest cost		5.2			4.4			10.2			9.0
Expected return on plan assets		(8.0	)		(6.4	)		(15.8	)		(12.9	)
Amortization of prior service cost		(0.2	)		(0.3	)		(0.4	)		(0.4	)
Amortization of unrecognized actuarial loss		1.8			0.8			3.7			1.7
Net periodic benefit cost	$	6.0		$	4.7		$	11.8		$	9.9