GOODWILL AND INTANGIBLE ASSETS (Details 2) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	$ 772.1	$ 777.8	$ 773.1
Finite-Lived Intangible Assets, Accumulated Amortization	(423.6)	(378.4)	(368.2)
Finite-Lived Intangible Assets, Net	348.5	399.4	404.9
Customers, customer contracts and relationships
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	676.1	681.0	676.5
Finite-Lived Intangible Assets, Accumulated Amortization	(347.8)	(312.5)	(299.2)
Finite-Lived Intangible Assets, Net	328.3	368.5	377.3
Trade name
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	0.0	0.0	7.1
Finite-Lived Intangible Assets, Accumulated Amortization	0.0	0.0	(7.1)
Finite-Lived Intangible Assets, Net	0.0	0.0	0.0
Acquired technology
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	94.2	95.0	87.7
Finite-Lived Intangible Assets, Accumulated Amortization	(75.1)	(65.3)	(61.3)
Finite-Lived Intangible Assets, Net	19.1	29.7	26.4
Other
Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	1.8	1.8	1.8
Finite-Lived Intangible Assets, Accumulated Amortization	(0.7)	(0.6)	(0.6)
Finite-Lived Intangible Assets, Net	$ 1.1	$ 1.2	$ 1.2