REVENUE AND CONTRACT ACQUISITION COSTS - Revenue Disaggregated by Types and Geography (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,522.1	$ 1,464.0	$ 3,009.8	$ 2,756.1
Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue	895.3	796.4	1,705.6	1,502.3
Systems
Disaggregation of Revenue [Line Items]
Total revenue	375.1	439.6	803.2	808.3
Services
Disaggregation of Revenue [Line Items]
Total revenue	251.7	228.0	501.0	445.5
U.S.
Disaggregation of Revenue [Line Items]
Total revenue	1,011.1	1,005.8	1,975.9	1,853.3
U.S. | Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue	625.1	577.5	1,175.7	1,078.3
U.S. | Systems
Disaggregation of Revenue [Line Items]
Total revenue	218.0	277.6	466.3	480.3
U.S. | Services
Disaggregation of Revenue [Line Items]
Total revenue	168.0	150.7	333.9	294.7
Outside of U.S. (“OUS”)
Disaggregation of Revenue [Line Items]
Total revenue	511.0	458.2	1,033.9	902.8
Outside of U.S. (“OUS”) | Instruments and accessories
Disaggregation of Revenue [Line Items]
Total revenue	270.2	218.9	529.9	424.0
Outside of U.S. (“OUS”) | Systems
Disaggregation of Revenue [Line Items]
Total revenue	157.1	162.0	336.9	328.0
Outside of U.S. (“OUS”) | Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 83.7	$ 77.3	$ 167.1	$ 150.8