DEBT - Narrative (Details)		3 Months Ended		6 Months Ended
	Nov. 13, 2024	Mar. 30, 2025 USD ($) $ / shares	Mar. 31, 2024 $ / shares	Mar. 30, 2025 USD ($) $ / shares	Mar. 31, 2024 $ / shares	Feb. 28, 2025 $ / shares	Sep. 30, 2024 USD ($)
Debt Instrument [Line Items]
Dividend per share (in dollars per share) | $ / shares		$ 0.47	$ 0.42	$ 0.94	$ 0.84
3.375% Exchangeable Notes, due June 1, 2029
Debt Instrument [Line Items]
Stated interest rate		3.375%		3.375%		3.375%	3.40%
Convertible Debt | 3.375% Exchangeable Notes, due June 1, 2029
Debt Instrument [Line Items]
Debt instrument, conversion price (in dollars per share) | $ / shares						$ 121.72
Debt associated capped per share (in dollars per share) | $ / shares						$ 159.17
Senior Notes | 3.375% Exchangeable Notes, due June 1, 2029
Debt Instrument [Line Items]
Debt instrument conversion ratio	0.0082158
Revolving Credit Facility
Debt Instrument [Line Items]
Revolver facility		$ 83,000,000.0		$ 83,000,000.0			$ 0
Maximum borrowing capacity		$ 500,000,000		$ 500,000,000
Stated interest rate		6.20%		6.20%			0.00%
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Remaining borrowing capacity		$ 408,600,000		$ 408,600,000
Letter of Credit | Line of Credit
Debt Instrument [Line Items]
Long-term debt		$ 8,400,000		$ 8,400,000