Retirement Benefit Plans (Details 1)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
U.S. and Puerto Rico [Member]
Weighted average actuarial assumptions used to determine net pension expense for our defined benefit retirement plans
Discount rate	5.82%	6.26%	5.79%
Rate of compensation increase	3.81%	3.80%	3.84%
Expected long-term rate of return on plan assets	7.75%	7.50%	7.75%
Foreign-based defined benefit plans [Member]
Weighted average actuarial assumptions used to determine net pension expense for our defined benefit retirement plans
Discount rate	2.82%	3.19%	3.40%
Rate of compensation increase	2.64%	2.63%	2.39%
Expected long-term rate of return on plan assets	4.01%	4.12%	4.16%