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OPERATING REVENUES - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts receivable
Disaggregation of operating revenue
Due from contracts with customers	$ 19.8	$ 34.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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