Retirement Benefit Plans (Details 4) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Amounts recognized on the Consolidated Balance Sheets:
Non-current assets	$ 176.2	$ 223.5
Current liabilities	(8.1)	(6.5)
Pension Plan, Defined Benefit [Member]
Amounts recognized on the Consolidated Balance Sheets:
Non-current assets	176.2	342.3
Current liabilities	4.1	4.8
Non-current liabilities	(103.6)	(109.9)
Total	68.5	227.6
International Plans [Member]
Amounts recognized on the Consolidated Balance Sheets:
Non-current assets	0	0.3
Current liabilities	4.0	1.7
Non-current liabilities	(62.3)	(69.1)
Total	$ (66.3)	$ (70.5)