Retirement Benefit Plans - Balance Sheet (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amounts recognized on the Consolidated Balance Sheets:
Current liabilities	$ (6.3)	$ (6.3)
U.S. Plans
Amounts recognized on the Consolidated Balance Sheets:
Non-current assets	0.0	1.1
Current liabilities	(4.8)	(4.9)
Non-current liabilities	(128.9)	(106.8)
Total	(133.7)	(110.6)
International Plans
Amounts recognized on the Consolidated Balance Sheets:
Non-current assets	0.3	3.9
Current liabilities	(1.5)	(1.4)
Non-current liabilities	(31.4)	(48.8)
Total	$ (32.6)	$ (46.3)