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INCOME TAXES - Activity related to unrecognized tax benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the Beginning of the Period	$ 2.5	$ 2.6	$ 18.5
Additions for current year tax positions	0.1	0.0	0.0
Additions for prior year tax positions	5.6	1.8	0.6
Reductions for prior year tax positions	(1.6)	(1.9)	(0.1)
Reductions for tax positions related to current year	0.0	0.0	0.0
Reductions related to expirations of statute of limitations	(0.2)	0.0	(0.9)
Settlements	0.0	0.0	(15.5)
Balance at the End of the Period	$ 6.4	$ 2.5	$ 2.6

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15A
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-URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A

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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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