RESTRUCTURING CHARGES - Restructuring and Related Charges Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Charges incurred during period	$ 26.1	$ 49.7
RGGA Program
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	68.8
Charges incurred during period	33.1
Charges incurred through end of period	101.9	68.8
RGGA Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	50.5
Charges incurred during period	26.1	50.5
Charges incurred through end of period	76.6	50.5
RGGA Program | Employee Severance and Other Personnel Benefits
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	48.6
Charges incurred during period	4.1	48.6
Charges incurred through end of period	52.7	48.6
RGGA Program | Other
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	1.9
Charges incurred during period	22.0	1.9
Charges incurred through end of period	23.9	1.9
RGGA Program | Leases
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	12.6
Charges incurred during period	5.1
Charges incurred through end of period	17.7	12.6
RGGA Program | Other Related Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	5.7
Charges incurred during period	1.9
Charges incurred through end of period	$ 7.6	$ 5.7