Retirement Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension settlement loss	$ 0.0	$ 25.7	$ 3.1
Defined contribution expense	28.3	28.0	27.6
Defined benefit pension expense	10.1	35.5	18.6
Other postretirement employee benefit expense	1.4	3.3	3.3
Total	39.8	66.8	49.5
Discretionary contributions to German plans			$ 30.2
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Under Contractual Obligation	3.2
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	15.0
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in next fiscal year	$ 25.0
U.S. Plans:
Defined Benefit Plan Disclosure [Line Items]
Settlement and curtailment		(48.1)
Defined Benefit Plan, Settlements, Plan Assets		$ 48.1