Retirement Benefit Plans (Assumptions Used in Accounting for Defined Benefit Plans) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets for net periodic benefit cost	7.50%	7.75%	7.75%
U.S. Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation	3.60%	3.70%	3.45%
Weighted average discount rates for net periodic benefit cost	3.70%	3.45%	4.00%
U.S. Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation	4.00%	4.20%	3.95%
Weighted average discount rates for net periodic benefit cost	4.20%	3.95%	4.75%
Non-U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation	3.75%	4.00%	3.75%
Weighted average discount rates for net periodic benefit cost	4.00%	3.75%	4.50%
Rate of increase in compensation levels	3.50%	3.50%	3.50%
Expected long-term rate of return on assets for net periodic benefit cost	5.50%	5.75%	6.00%