SUBSEQUENT EVENTS (Details) $ / shares in Units, $ in Billions				6 Months Ended
	Apr. 03, 2018 USD ($)	Mar. 30, 2018 USD ($)	Jan. 30, 2018 AUD ($) $ / shares	Mar. 30, 2018 USD ($)	May 04, 2018 $ / shares
2018 Revolving Credit Facility
Subsequent Event [Line Items]
Amount borrowed on line of credit		$ 255,000,000
2018 Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Credit facility term (in years)	5 years
Loan facility, maximum borrowing capacity	$ 1,800,000,000.0
2017 Revolving Credit Facility
Subsequent Event [Line Items]
Loan facility, maximum borrowing capacity		600,000,000		$ 600,000,000
Repayment of line of credit		255,000,000
Revolving Credit Facility | 2018 Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Additional maximum commitment amount	100,000,000.0
Revolving Credit Facility | 2017 Revolving Credit Facility
Subsequent Event [Line Items]
Credit facility term (in years)				5 years
Letter of Credit | Revolving Credit Facility | 2018 Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Loan facility, maximum borrowing capacity	50,000,000.0
Swing Line Loans | Revolving Credit Facility | 2018 Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Loan facility, maximum borrowing capacity	$ 25,000,000
Sirtex
Subsequent Event [Line Items]
Acquisition, share price (in AUD per share) | $ / shares			$ 28
Acquisition price		$ 1,200,000,000	$ 1.6
Sirtex | Subsequent Event
Subsequent Event [Line Items]
Competing bid for Sirtex made by CDH Investments (in AUD per share) | $ / shares					$ 33.60