ACQUISITIONS AND DISPOSITIONS - Narrative (Details) - USD ($)		3 Months Ended	6 Months Ended
	Apr. 07, 2022	Apr. 30, 2022	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Sep. 30, 2021
Business Acquisition [Line Items]
Goodwill		$ 2,292,200,000	$ 2,292,200,000		$ 2,228,900,000
Customer Contracts for Healthcare Technology Management | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Technical Solutions
Business Acquisition [Line Items]
Sale of customer contracts for clinical engineering services, consideration				$ 8,500,000
Gain on sale of customer contracts for clinical engineering services			7,700,000
Minimum
Business Acquisition [Line Items]
Amount of reasonably possible loss		0	0
Minimum | Able Legal Matters
Business Acquisition [Line Items]
Amount of reasonably possible loss		0	0
Maximum
Business Acquisition [Line Items]
Amount of reasonably possible loss		5,000,000	5,000,000
Maximum | Able Legal Matters
Business Acquisition [Line Items]
Amount of reasonably possible loss		2,600,000	2,600,000
Able
Business Acquisition [Line Items]
Cash consideration placed in escrow						$ 12,100,000
Cash consideration placed in escrow for indemnification asset						8,200,000
Revenues associated with acquisition		282,700,000	590,600,000
Operating profit associated with acquisition		11,500,000	26,000,000
Acquisition-related and integration costs		500,000	8,800,000
Loss contingency accrual		18,100,000	18,100,000		$ 900,000
Goodwill		583,000,000.0	583,000,000.0			$ 554,000,000.0
Momentum
Business Acquisition [Line Items]
Purchase price	$ 54,800,000
Revenues associated with acquisition		4,900,000	4,900,000
Operating profit associated with acquisition		300,000	300,000
Goodwill		41,600,000	41,600,000
Intangibles acquired		$ 10,400,000	$ 10,400,000