Retirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Retirement Benefit Plans [Abstract]

Components of net pension expense

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Service cost	$	7.4		$	6.4		$	21.5		$	18.9
Interest cost		5.2			4.5			15.4			13.5
Expected return on plan assets		(8.1	)		(6.5	)		(23.9	)		(19.4	)
Amortization of prior service cost		(0.3	)		(0.2	)		(0.7	)		(0.6	)
Amortization of unrecognized actuarial loss		1.9			0.8			5.6			2.5
Net periodic benefit cost	$	6.1		$	5.0		$	17.9		$	14.9