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SHAREHOLDER’S EQUITY - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions				1 Months Ended	3 Months Ended		4 Months Ended	5 Months Ended	12 Months Ended
	May 23, 2024	Nov. 16, 2023	Jun. 20, 2023	May 31, 2024	Sep. 30, 2025	Feb. 28, 2025	Jun. 29, 2025	May 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	May 20, 2024	Dec. 31, 2023	Jun. 17, 2023
Accelerated Share Repurchases [Line Items]
Authorized share repurchase amount															$ 500.0		$ 1,000.0
Number of shares repurchased (in shares)									4.4	7.4	5.7
Treasury stock repurchases	$ 50.0			$ 50.0
Common stock, par value (in dollars per share)					$ 0.01				$ 0.01	$ 0.01
Payments for repurchase of common stock									$ 326.4	$ 482.7	$ 34.7
Treasury Stock
Accelerated Share Repurchases [Line Items]
Treasury stock repurchases									326.4	$ 565.9	$ 434.7
Open market purchases
Accelerated Share Repurchases [Line Items]
Authorized share repurchase amount					$ 100.0				$ 100.0			$ 50.0	$ 50.0	$ 150.0		$ 200.0
Number of shares repurchased (in shares)					0.8	1.8	0.8	1.9	4.4	5.6	0.4
Treasury stock repurchases					$ 45.3			$ 153.6
Open market purchases | Treasury Stock
Accelerated Share Repurchases [Line Items]
Treasury stock repurchases									$ 326.4	$ 432.7	$ 34.7
ASR Agreement
Accelerated Share Repurchases [Line Items]
Number of shares repurchased (in shares)		1.3	5.3						0.0	1.3	5.3
Treasury stock repurchases										$ 0.0	$ 500.0
Accelerated share repurchase amount			$ 500.0
Common stock, par value (in dollars per share)			$ 0.01
Payments for repurchase of common stock			$ 500.0
Treasury stock, acquired, percentage			80.00%
Value of repurchased common stock from related parties										83.2
ASR Agreement | Treasury Stock
Accelerated Share Repurchases [Line Items]
Treasury stock repurchases			$ 400.0						$ 0.0	83.2	400.0
ASR Agreement | Additional Paid-in Capital
Accelerated Share Repurchases [Line Items]
Treasury stock repurchases			$ (100.0)							$ (83.2)	$ 100.0

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Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Face amount or stated value per share of common stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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