Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Name:	us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - Pension plan (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
U.S. Pension Benefits
Employee benefit plan disclosures
Aggregated fair value of plan assets at end of period	$ 84.3	$ 84.2
U.S. Pension Benefits \| Significant other observable inputs (Level 2)
Employee benefit plan disclosures
Valuation percentage of plan assets	6.00%
U.S. Pension Benefits \| Equity Securities - U.S.
Employee benefit plan disclosures
Target Allocation (as a percent)	49.00%
U.S. Pension Benefits \| Bond market fund
Employee benefit plan disclosures
Target Allocation (as a percent)	45.00%
U.S. Pension Benefits \| Private Real Estate
Employee benefit plan disclosures
Target Allocation (as a percent)	6.00%
U.S. Pension Benefits \| Investments at net Asset value
Employee benefit plan disclosures
Valuation percentage of plan assets	94.00%
International Pension Benefits
Employee benefit plan disclosures
Aggregated fair value of plan assets at end of period	$ 126.0	$ 128.7
International Pension Benefits \| Investments at net Asset value
Employee benefit plan disclosures
Valuation percentage of plan assets	63.00%
International Pension Benefits \| Collective trust fund
Employee benefit plan disclosures
Valuation percentage of plan assets	37.00%