The amount of increase (decrease) in deferred income tax expense (benefit) of equity method investments.

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The amount of increase (decrease) in retained earnings from equity method investments.

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The percentage of equity method interests sold.

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The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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INVESTMENT IN SSAT (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
INVESTMENT IN SSAT (Details) - USD ($) $ in Millions	Mar. 01, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Investments in affiliates
Investment in SSAT		$ 98.3			$ 98.3		$ 84.1
Financial information for equity method investment
Company's Share of SSAT's Net Income (Loss)		7.3	$ 1.2		13.9	$ 1.6
SSAT ST
Investments in affiliates
Ownership percentage, noncontrolling owner	50.00%
SSAT
Investments in affiliates
Investment in SSAT		98.3			98.3		$ 84.1
Increase in equity method investment in SSAT				$ 13.2
Equity Method Investments, Increase (decrease) in deferred income taxes expense (benefit),				3.1
Equity method investments, increase (decrease) in retained earnings				$ 10.1
Financial information for equity method investment
Operating revenue		307.7	273.9		619.2	544.2
Operating costs and expenses		(294.6)	(278.5)		(592.1)	(556.9)
Operating income (loss)		13.1	(4.6)		27.1	(12.7)
SSAT's Net Income (Loss)		18.7	2.1		36.4	(1.7)
SSAT
Financial information for equity method investment
Company's Share of SSAT's Net Income (Loss)		$ 7.3	$ 1.2		$ 13.9	$ 1.6
SSAT \| SSAT ST
Investments in affiliates
Percentage of interests sold in SSAT ST	25.00%
SSAT's ownership interest in SSAT ST (as a percent)	50.00%