RESTRUCTURING CHARGES - Restructuring Reserve (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 2.7
Expense, Net	4.3
Cash Utilized, Net	(6.4)
Liability Balance at period end	0.6
RGGA:
Restructuring Reserve [Roll Forward]
Expense, Net	8.1
RGGA: | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1.9
Expense, Net	4.8
Cash Utilized, Net	(6.4)
Liability Balance at period end	0.3
RGGA: | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1.9
Expense, Net	0.9
Cash Utilized, Net	(2.5)
Liability Balance at period end	0.3
RGGA: | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	3.9
Cash Utilized, Net	(3.9)
Liability Balance at period end	0.0
Other restructuring initiatives: | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.8
Expense, Net	(0.5)
Cash Utilized, Net	0.0
Liability Balance at period end	0.3
Other restructuring initiatives: | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.8
Expense, Net	(0.5)
Cash Utilized, Net	0.0
Liability Balance at period end	$ 0.3