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DEBT - Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
DEBT
Contractual interest	$ 45.7	$ 35.3	$ 35.6
Amortization of debt discount and issuance costs	2.3	3.4	2.2
Interest expense	48.0	38.7	37.8
Interest income	(0.6)	(1.1)	(1.9)
Interest expense, net	$ 47.4	$ 37.6	$ 35.9

X

- Definition

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs and credit facility fees.

+ References

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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- Definition

The net amount of nonoperating interest income (expense).

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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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