BUSINESS COMBINATIONS - Valuation of Intangible Assets Acquired (Details) $ in Millions	1 Months Ended
	Jun. 28, 2019 USD ($)
Cancer Treatment Services International
Business Acquisition [Line Items]
Total intangible assets with finite lives	$ 117.0
In-process research and development with indefinite lives	0.0
Total intangible assets	117.0
Endocare and Alicon
Business Acquisition [Line Items]
Total intangible assets with finite lives	61.1
In-process research and development with indefinite lives	10.4
Total intangible assets	71.5
Technologies and trade names | Cancer Treatment Services International
Business Acquisition [Line Items]
Total intangible assets with finite lives	$ 47.9
Weighted Average Estimated Useful Life (In Years)	10 years 8 months 12 days
Technologies and trade names | Endocare and Alicon
Business Acquisition [Line Items]
Total intangible assets with finite lives	$ 56.3
Weighted Average Estimated Useful Life (In Years)	7 years 8 months 12 days
Customer contracts, supplier relationships, and partner relationships (1) | Cancer Treatment Services International
Business Acquisition [Line Items]
Total intangible assets with finite lives	$ 69.1
Weighted Average Estimated Useful Life (In Years)	26 years 4 months 24 days
Customer contracts, supplier relationships, and partner relationships (1) | Endocare and Alicon
Business Acquisition [Line Items]
Total intangible assets with finite lives	$ 4.8
Weighted Average Estimated Useful Life (In Years)	3 years
Minimum | Partner relationships with hospitals | Cancer Treatment Services International
Business Acquisition [Line Items]
Weighted Average Estimated Useful Life (In Years)	27 years
Maximum | Partner relationships with hospitals | Cancer Treatment Services International
Business Acquisition [Line Items]
Weighted Average Estimated Useful Life (In Years)	29 years