Retirement Benefit Plans (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
U.S. and Puerto Rico [Member]
Changes in projected benefit obligations
Projected benefit obligation - beginning of year	$ 227.1	$ 187.6
Service cost	11.4	10.9	12.3
Interest cost	13.0	11.5	10.6
Benefits paid	(4.5)	(3.6)
Actuarial loss	43.0	20.7
Projected benefit obligation - end of year	290.0	227.1	187.6
Foreign-based defined benefit plans [Member]
Changes in projected benefit obligations
Projected benefit obligation - beginning of year	226.5	197.3
Service cost	16.8	14.6	13.7
Interest cost	7.3	6.7	6.8
Employee contributions	15.9	12.6
Benefits paid	(36.7)	(18.1)
Actuarial loss	0.4	0.2
Prior service cost	(1.6)
Expenses Paid	(0.1)
Translation loss	6.6	13.2
Projected benefit obligation - end of year	$ 235.1	$ 226.5	$ 197.3