Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	$ (156.8)		$ (166.6)	$ (156.8)
Discretionary contributions to German plans				30.2	$ 137.5
Pension settlement			25.7	3.1	0.0
Defined contribution expense			28.0	27.6	24.9
Defined benefit pension expense			35.5	18.6	24.3
Other postretirement employee benefit expense			3.3	3.3	5.7
Total			66.8	49.5	54.9
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Under Contractual Obligation			8.5
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
Funded status of plan	(40.6)		(64.9)	(40.6)
Pension settlement	0.4	$ 2.7	25.7	3.1	$ 0.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments			(25.7)	(3.1)
United States
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	(40.6)		(64.9)	(40.6)
Germany
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	(76.5)		(64.3)	(76.5)
Other
Defined Benefit Plan Disclosure [Line Items]
Funded status of plan	$ (39.7)		$ (37.4)	$ (39.7)