OTHER ASSETS (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Other Assets [Abstract]
Supply contracts	$ 1,006.4	$ 1,082.7	$ 1,006.4	$ 1,082.7	$ 1,047.3
Pension assets	60.3	1.8	60.3	1.8	43.3
Capital contributions	22.4	0.0	22.4	0.0	23.0
Other	70.6	60.3	70.6	60.3	71.5
Other assets	1,159.7	1,144.8	1,159.7	1,144.8	$ 1,185.1
Payments under other long-term supply contracts			0.0	46.7
Amortization of Supply Contracts	20.9	$ 18.3	$ 41.8	$ 36.6
Investment Tax Credit	$ 22.0

Amount of amortization recognized in connection with the various long-term supply contracts.

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- Definition

Long-term Other Supply Contract Payments

+ References

No definition available.

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- Definition

Amount of other assets in connection with the Ethylene Supply Agreement and expected to be realized.

+ References

No definition available.

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- Definition

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

+ References

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- Definition

The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.

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- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

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Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

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Amount of noncurrent assets classified as other.

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