PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - Pension plan assets measured at fair value (Details) - Pensions - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total pension plan assets, percent	98.50%
U.S.
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	$ 371.4	$ 377.3	$ 517.5
U.S. | Fair value, measurements, recurring
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	371.4	377.3
U.S. | Fair value, measurements, recurring | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	6.4	36.9
U.S. | Fair value, measurements, recurring | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	86.2
U.S. | Fair value, measurements, recurring | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	1.4	67.0
U.S. | Fair value, measurements, recurring | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	76.3	28.4
U.S. | Fair value, measurements, recurring | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	195.3	108.8
U.S. | Fair value, measurements, recurring | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	5.8	136.2
U.S. | Fair value, measurements, recurring | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 1
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	94.0	103.9
U.S. | Fair value, measurements, recurring | Level 1 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	6.4	36.9
U.S. | Fair value, measurements, recurring | Level 1 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	86.2
U.S. | Fair value, measurements, recurring | Level 1 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	1.4	67.0
U.S. | Fair value, measurements, recurring | Level 1 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 1 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 1 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 1 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 1 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
U.S. | Fair value, measurements, recurring | Level 2 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 2 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
U.S. | Fair value, measurements, recurring | Level 3 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Level 3 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Net Asset Value
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	277.4	273.4
U.S. | Fair value, measurements, recurring | Net Asset Value | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Net Asset Value | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
U.S. | Fair value, measurements, recurring | Net Asset Value | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Net Asset Value | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
U.S. | Fair value, measurements, recurring | Net Asset Value | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	76.3	28.4
U.S. | Fair value, measurements, recurring | Net Asset Value | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	195.3	108.8
U.S. | Fair value, measurements, recurring | Net Asset Value | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	5.8	136.2
U.S. | Fair value, measurements, recurring | Net Asset Value | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	394.0	372.0	$ 627.5
International | Fair value, measurements, recurring
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	394.0	372.0
International | Fair value, measurements, recurring | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	10.6	49.4
International | Fair value, measurements, recurring | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
International | Fair value, measurements, recurring | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	5.1	9.1
International | Fair value, measurements, recurring | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	46.7	42.7
International | Fair value, measurements, recurring | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	279.2	220.4
International | Fair value, measurements, recurring | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	2.4	2.3
International | Fair value, measurements, recurring | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	50.0	48.1
International | Fair value, measurements, recurring | Level 1
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	65.7	106.6
International | Fair value, measurements, recurring | Level 1 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	10.6	49.4
International | Fair value, measurements, recurring | Level 1 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
International | Fair value, measurements, recurring | Level 1 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 1 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	5.1	9.1
International | Fair value, measurements, recurring | Level 1 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 1 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 1 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 1 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	50.0	48.1
International | Fair value, measurements, recurring | Level 2
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
International | Fair value, measurements, recurring | Level 2 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 2 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
International | Fair value, measurements, recurring | Level 3 | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Level 3 | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Net Asset Value
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	328.3	265.4
International | Fair value, measurements, recurring | Net Asset Value | Cash and cash equivalents
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Net Asset Value | Current receivable
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0
International | Fair value, measurements, recurring | Net Asset Value | U.S. companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Net Asset Value | International companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	0.0	0.0
International | Fair value, measurements, recurring | Net Asset Value | Registered investment companies
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	46.7	42.7
International | Fair value, measurements, recurring | Net Asset Value | Hedge funds
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	279.2	220.4
International | Fair value, measurements, recurring | Net Asset Value | Limited partnerships
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	2.4	2.3
International | Fair value, measurements, recurring | Net Asset Value | Real estate and other investments
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Total plan assets	$ 0.0	$ 0.0