SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)		3 Months Ended
	Aug. 02, 2020 USD ($) $ / shares	Jan. 01, 2021 USD ($) specialty_hospital cancer_center	Oct. 02, 2020 USD ($)	Jan. 03, 2020 USD ($)	Nov. 01, 2019 USD ($)	Oct. 31, 2019 USD ($)	Sep. 27, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of cancer centers | cancer_center		13
Amount of accessible liquidity		$ 1,700,000,000
Cash and cash equivalents		773,300,000	$ 766,100,000
Loan facility, remaining borrowing capacity		972,000,000
Loan facility, maximum borrowing capacity		1,200,000,000
Decrease in retained earnings		(2,247,800,000)	(2,084,800,000)	$ (1,857,300,000)			$ (1,777,600,000)
Retained Earnings
Segment Reporting Information [Line Items]
Decrease in retained earnings		(1,225,600,000)	(1,133,000,000.0)	$ (983,200,000)			$ (934,000,000.0)
Cumulative Effect, Period of Adoption, Adjustment
Segment Reporting Information [Line Items]
Decrease in retained earnings			3,900,000
Financing receivable, allowance for credit loss			3,900,000
Cumulative Effect, Period of Adoption, Adjustment | Trade Accounts Receivable
Segment Reporting Information [Line Items]
Financing receivable, allowance for credit loss			3,400,000
Cumulative Effect, Period of Adoption, Adjustment | Notes Receivable
Segment Reporting Information [Line Items]
Financing receivable, allowance for credit loss		$ 500,000	500,000
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Segment Reporting Information [Line Items]
Decrease in retained earnings			$ 3,900,000
Merger Agreement with Siemens Healthineers
Segment Reporting Information [Line Items]
Business acquisition, share price (in dollars per share) | $ / shares	$ 177.50
Acquisition purchase price	$ 16,400,000,000
Potential termination fee	450,000,000.0
Merger Agreement with Siemens Healthineers | Minimum
Segment Reporting Information [Line Items]
Potential reverse termination fee	450,000,000.0
Merger Agreement with Siemens Healthineers | Maximum
Segment Reporting Information [Line Items]
Potential reverse termination fee	$ 925,000,000.0
Revolving Credit Facility
Segment Reporting Information [Line Items]
Loan facility, maximum borrowing capacity					$ 1,200,000,000	$ 1,800,000,000
India
Segment Reporting Information [Line Items]
Number of specialty hospitals | specialty_hospital		1
Sri Lanka
Segment Reporting Information [Line Items]
Number of cancer centers | specialty_hospital		1