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Employee Defined Benefit Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Jul. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement plan liability						$ 7.9
Net periodic benefit cost	$ 0.1	$ 0.1	$ 0.2	$ 0.2
Other Long-term Investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit obligation	$ 4.3		$ 4.3		$ 4.5

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- Definition

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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