Retirement Benefit Plans - Benefit Obligation Assumptions (Details)	Dec. 31, 2016	Dec. 31, 2015
U.S. Plans [Member] | Minimum [Member]
Assumptions
Discount rate	4.34%	4.50%
Future compensation assumption	2.50%	2.00%
U.S. Plans [Member] | Maximum [Member]
Assumptions
Discount rate	4.50%	4.70%
Future compensation assumption	3.00%	3.00%
International Plans [Member] | Minimum [Member]
Assumptions
Discount rate	1.25%	1.50%
Future compensation assumption	2.00%	2.20%
International Plans [Member] | Maximum [Member]
Assumptions
Discount rate	9.00%	8.75%
Future compensation assumption	8.00%	8.00%