RETIREMENT BENEFIT PLANS - Funded Status of Non-U.S. Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. Pension Benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	$ 33.1	$ 46.4
Service cost	0.0	0.0	$ 0.0
Interest cost	1.7	1.1	1.0
Employee contributions	0.0	0.0
Benefits paid and other plan costs	(2.1)	(2.2)
Actuarial loss (gain)	0.5	(12.2)
Amendments, settlements and curtailments	0.0	0.0
Plan acquisitions and other	0.0	0.0
Foreign exchange rate impact	0.0	0.0
Benefit obligation at end of year	33.2	33.1	46.4
Change in plan assets:
Fair value of plan assets at beginning of year	25.9	31.9
Actual return on plan assets	2.3	(5.7)
Employer contributions	1.4	1.9
Employee contributions	0.0	0.0
Amendments and settlements	0.0	0.0
Benefits paid and other plan costs	(2.0)	(2.2)
Plan acquisitions and other	0.0	0.0
Foreign exchange rate impact	0.0	0.0
Fair value of plan assets at end of year	27.6	25.9	31.9
Funded status	(5.6)	(7.2)
Amount recorded in AOCI
Prior service cost	0.0	0.0
Net gain (loss)	2.1	1.6
Total pre-tax amount	2.1	1.6
U.S. Pension Benefits | Other assets
Change in plan assets:
Funded status	0.0	0.0
U.S. Pension Benefits | Accrued expenses and other current liabilities
Change in plan assets:
Funded status	(0.6)	(0.6)
U.S. Pension Benefits | Other long-term liabilities
Change in plan assets:
Funded status	(5.0)	(6.6)
Non-U.S. Pension Benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	230.7	340.8
Service cost	2.6	3.5	4.1
Interest cost	8.8	3.4	2.8
Employee contributions	1.4	1.3
Benefits paid and other plan costs	(11.4)	(10.1)
Actuarial loss (gain)	12.5	(81.0)
Amendments, settlements and curtailments	(1.8)	(4.6)
Plan acquisitions and other	(0.4)	1.4
Foreign exchange rate impact	11.0	(24.0)
Benefit obligation at end of year	253.4	230.7	340.8
Change in plan assets:
Fair value of plan assets at beginning of year	162.7	223.1
Actual return on plan assets	6.4	(40.2)
Employer contributions	10.9	10.7
Employee contributions	1.4	1.3
Amendments and settlements	(1.2)	(4.7)
Benefits paid and other plan costs	(11.4)	(10.1)
Plan acquisitions and other	(0.3)	(0.4)
Foreign exchange rate impact	8.3	(17.0)
Fair value of plan assets at end of year	176.8	162.7	$ 223.1
Funded status	(76.6)	(68.0)
Amount recorded in AOCI
Prior service cost	(1.2)	(2.0)
Net gain (loss)	(48.3)	(34.2)
Total pre-tax amount	(49.5)	(36.2)
Non-U.S. Pension Benefits | Other assets
Change in plan assets:
Funded status	11.1	7.1
Non-U.S. Pension Benefits | Accrued expenses and other current liabilities
Change in plan assets:
Funded status	(4.0)	(3.8)
Non-U.S. Pension Benefits | Other long-term liabilities
Change in plan assets:
Funded status	$ (83.7)	$ (71.3)