OTHER OPERATING (INCOME) EXPENSE, NET - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Transaction-related (benefits) costs		$ (4)	$ 3	$ (5)	$ 20
Transaction-related costs, related to adjustments under the Tax Matters Agreement		11		18
Transaction-related costs, related to the spin-off		5		8
Transaction-related costs, related to the evaluation of strategic acquisition initiatives		2		5
Restructuring expense, net		$ 2	$ 3	$ 7	$ 5
Swedish Electromagnet Invest AB (SEM) \| Subsequent Event
Restructuring Cost and Reserve [Line Items]
Expected Payments To Acquire Business	$ 47

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- 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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