SPECIAL (GAINS) AND CHARGES - Restructuring and Non-Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended	36 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2020
Other restructuring information
Restructuring Costs					$ (35.1)	$ (9.4)
Other special gains and charges	$ 3.6				10.7
Other special gains and charges, after-tax	2.7				8.3
Special (gains) and charges	6.3	$ 35.0			36.7	120.3
C O V I D 19
Non-restructuring Special (Gains) and Charges
Inventory-related reserves	50.0				50.0
Expenses Incurred To Pay Employees Impacted By Pandemic	2.6	4.1			12.6	30.6
Net charges (gains) related to the pandemic	40.6	(0.9)			51.9	12.3
Medical charges and testing fee	3.1				11.5
Gain from government subsidy	3.5
Special (gains) and charges
Other restructuring information
Restructuring charges incurred, pre-tax	0.4	26.9			6.5	31.4
Business combination advisory and legal fees, pre tax	0.8	2.7			3.3	5.5
Business combination advisory and legal fees, after tax	0.8	(2.3)			2.9	4.3
Other special gains and charges	3.6	8.4			10.7	30.3
Special (gains) and charges	6.3	35.0			36.7	120.3
Disposal And Impairment charges						45.9
Disposal And Impairment charges, after tax						45.0
Equity Method Investment, Other than Temporary Impairment			$ 28.6
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal				$ (17.3)
Non-restructuring Special (Gains) and Charges
Gain (loss) on sale of business, before tax				(17.3)
Gain (loss) on sale of business, net of tax				$ (16.3)
Litigation related charges, before tax		8.4				30.3
Litigation related charges, after tax		7.2				23.7
Cost of sales
Other restructuring information
Restructuring charges incurred, pre-tax	2.2	1.0			24.1	6.6
Business combination advisory and legal fees, pre tax		1.5				4.1
Other special gains and charges		5.2			0.3	26.2
Special (gains) and charges	52.9	9.5			76.2	45.6
Cost of sales | C O V I D 19
Non-restructuring Special (Gains) and Charges
Gain from government subsidy	3.5	5.3			6.1	14.7
Interest expense
Other restructuring information
Business combination advisory and legal fees, pre tax						0.7
Business combination advisory and legal fees, after tax						0.6
Special (gains) and charges	32.3	83.1			32.3	83.8
Non-restructuring Special (Gains) and Charges
Debt refinancing charges, pre-tax	32.3	83.1
Debt refinancing charges, net of tax	28.4	64.0
Other (income) expense
Other restructuring information
Special (gains) and charges	7.0				26.6
Pension settlements and curtailments	7.0				26.6
Pension settlements and curtailments, after tax	5.3				20.2
Product and sold equipment
Other restructuring information
Business combination advisory and legal fees, pre tax		1.5				4.1
Business combination advisory and legal fees, after tax		1.3				3.2
Product and sold equipment | Cost of sales
Other restructuring information
Other special gains and charges		5.2			0.3	26.2
Other special gains and charges, after-tax		3.5			0.2	17.8
Special (gains) and charges	52.9	$ 9.5			76.2	$ 45.6
Institutional Advancement Program
Restructuring
Recorded expense (income) and accrual					9.5		$ 35.2
Net cash payments					(21.6)		(10.5)
Non-cash net charges					(4.6)
Other restructuring information
Restructuring charge expected to be incurred, pre-tax	80.0				80.0
Restructuring charge expected to be incurred, after tax	60.0				60.0
Restructuring liability	8.0				8.0		24.7	$ 24.7
Restructuring charges incurred to date, pre-tax	44.7				44.7
Restructuring charges incurred to date, after-tax	33.9				33.9
Restructuring charges incurred, pre-tax	1.4				9.5
Restructuring charges incurred, after tax	1.4				7.5
Institutional Advancement Program | Employee termination costs
Restructuring
Recorded expense (income) and accrual					2.2		25.6
Net cash payments					(18.9)		(0.9)
Other restructuring information
Restructuring liability	8.0				8.0		24.7	24.7
Institutional Advancement Program | Asset disposals
Restructuring
Recorded expense (income) and accrual					6.0
Non-cash net charges					(6.0)
Institutional Advancement Program | Other
Restructuring
Recorded expense (income) and accrual					1.3		9.6
Net cash payments					(2.7)		(9.6)
Non-cash net charges					1.4
Accelerate 2020 Restructuring Plan
Restructuring
Recorded expense					2.9			239.2
Net cash payments					(33.7)			(155.3)
Non-cash charges					(0.4)			(11.2)
Effect of foreign currency translation								(0.9)
Other restructuring information
Restructuring charge expected to be incurred, pre-tax	255.0				255.0
Restructuring charge expected to be incurred, after tax	195.0				195.0
Restructuring liability	40.6				40.6		71.8	71.8
Accelerate 2020 Restructuring Plan | Special (gains) and charges
Other restructuring information
Restructuring liability	40.6				40.6
Restructuring charges incurred to date, pre-tax	242.1				242.1
Restructuring charges incurred to date, after-tax	186.6				186.6
Restructuring charges incurred, pre-tax	(1.5)				2.9
Restructuring charges incurred, after tax	(1.2)				2.8
Accelerate 2020 Restructuring Plan | Employee termination costs
Restructuring
Recorded expense					2.4			212.0
Net cash payments					(31.6)			(144.3)
Effect of foreign currency translation								(0.9)
Other restructuring information
Restructuring liability	37.6				37.6		66.8	66.8
Accelerate 2020 Restructuring Plan | Asset disposals
Restructuring
Recorded expense					0.3			8.0
Net cash payments								1.2
Non-cash charges					(0.3)			(9.2)
Accelerate 2020 Restructuring Plan | Other
Restructuring
Recorded expense					0.2			19.2
Net cash payments					(2.1)			(12.2)
Non-cash charges					(0.1)			(2.0)
Other restructuring information
Restructuring liability	3.0				3.0		5.0	5.0
Other Restructuring Plan
Other restructuring information
Restructuring charges incurred, pre-tax					18.2
Restructuring charges incurred, after tax					16.9
Restructuring net gain	0.3
Restructuring net gain, net of tax	0.5
Prior Year Plans
Other restructuring information
Restructuring liability	$ 4.6				4.6		$ 5.9	$ 5.9
Cash payments					$ 10.5