Retirement Benefit Plans - Employer Contributions to Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employer Contributions [Abstract]
Employer Contributions to Defined Benefit Plans	$ 11.2	$ 20.4	$ 17.9
Pension Plan
Employer Contributions [Abstract]
Employer Contributions to Defined Benefit Plans	11.2	$ 20.4
2023 (estimated)	$ 25.0