Retirement Benefit Plans - Reconciliation of Level 3 Investments (Details) - Non-U.S. Plan - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value at beginning of year	$ 12.6	$ 12.7
Fair value at end of year	13.4	12.6
UK Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value at beginning of year	12.6	12.7
Purchases, sales, issuances and settlements, net	(0.5)	(0.4)
Net (loss) gain	0.3	(0.2)
Net transfer into (out of) Level 3	(7.2)	0.7
Foreign currency	1.0	(0.2)
Fair value at end of year	$ 6.2	$ 12.6