ACQUISITIONS AND DISPOSITIONS - Purchase Price Allocation (Details) - USD ($)		12 Months Ended
	Sep. 30, 2022	Oct. 31, 2022	Sep. 30, 2022	Oct. 31, 2021	Sep. 01, 2022	Oct. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 2,485,600,000		$ 2,228,900,000		$ 1,671,400,000
Amortization period for acquired intangible assets		11 years		11 years
RavenVolt
Business Acquisition [Line Items]
Cash and cash equivalents					$ 29,000,000.0
Trade accounts receivable					16,500,000
Other assets					3,900,000
Intangible assets					16,500,000
Goodwill					207,500,000
Trade accounts payable					(5,200,000)
Deferred revenue					(31,600,000)
Other accrued liabilities					(3,200,000)
Deferred income tax liability, net					(4,400,000)
Net assets acquired					$ 229,000,000.0
Able
Business Acquisition [Line Items]
Cash and cash equivalents	$ 31,500,000		$ 31,500,000	$ 31,500,000
Trade accounts receivable	157,900,000		157,900,000	159,300,000
Adjustments, trade accounts receivable			(1,400,000)
Other assets	19,200,000		19,200,000	24,900,000
Adjustments, other assets			(5,700,000)
Goodwill	574,200,000		574,200,000	554,000,000.0
Adjustments, goodwill			20,200,000
Trade accounts payable	(34,600,000)		(34,600,000)	(27,000,000.0)
Adjustments, trade accounts payable			(7,600,000)
Accrued compensation	(40,600,000)		(40,600,000)	(38,200,000)
Adjustments, accrued compensation			(2,400,000)
Insurance claims	(77,800,000)		(77,800,000)	(91,600,000)
Adjustments, insurance claims			13,800,000
Other liabilities	(58,700,000)		(58,700,000)	(41,700,000)
Adjustments, other liabilities			(17,000,000.0)
Deferred income tax liability, net	(53,500,000)		(53,500,000)	(59,500,000)
Adjustments, deferred income tax liability			6,000,000.0
Net assets acquired	747,600,000		747,600,000	741,700,000
Adjustments, net assets acquired			5,900,000
Trade accounts receivable, gross	160,300,000		160,300,000
Estimated uncollectible trade accounts receivable	2,500,000		2,500,000
Goodwill tax deductible amount	0		0
Able | Customer relationships
Business Acquisition [Line Items]
Intangible assets, finite lived	$ 220,000,000.0		220,000,000.0	220,000,000.0
Amortization period for acquired intangible assets	15 years
Able | Trade names
Business Acquisition [Line Items]
Intangible assets, finite lived	$ 10,000,000.0		$ 10,000,000.0	$ 10,000,000.0
Amortization period for acquired intangible assets	2 years