SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 10,325.3
Other comprehensive income (loss) before reclassifications:
Increase (decrease)	(152.1)	$ (4.2)	$ (133.8)
Income tax impact	5.6	3.8	(10.3)
Other comprehensive income (loss) before reclassifications, net of income taxes	(146.5)	(0.4)	(144.1)
Amounts reclassified from AOCI into income:
Increase (decrease)	7.3	0.1	3.6
Income tax impact	(0.1)	(0.1)	(0.2)
Amounts reclassified from AOCI into income, net of income taxes:	7.2	0.0	3.4
Total other comprehensive income (loss), net of income taxes	(139.3)	(0.4)	(140.7)
Ending balance	10,195.6	10,325.3
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(291.7)	(301.4)	(122.7)
Other comprehensive income (loss) before reclassifications:
Increase (decrease)	(152.9)	9.7	(181.4)
Income tax impact	6.2	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of income taxes	(146.7)	9.7	(181.4)
Amounts reclassified from AOCI into income:
Increase (decrease)	7.0	0.0	2.7
Income tax impact	0.0	0.0	0.0
Amounts reclassified from AOCI into income, net of income taxes:	7.0	0.0	2.7
Total other comprehensive income (loss), net of income taxes	(139.7)	9.7	(178.7)
Ending balance	(431.4)	(291.7)	(301.4)
Pension & post-retirement plan benefit adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(34.4)	(24.3)	(62.3)
Other comprehensive income (loss) before reclassifications:
Increase (decrease)	0.8	(13.9)	47.6
Income tax impact	(0.6)	3.8	(10.3)
Other comprehensive income (loss) before reclassifications, net of income taxes	0.2	(10.1)	37.3
Amounts reclassified from AOCI into income:
Increase (decrease)	0.3	0.1	0.9
Income tax impact	(0.1)	(0.1)	(0.2)
Amounts reclassified from AOCI into income, net of income taxes:	0.2	0.0	0.7
Total other comprehensive income (loss), net of income taxes	0.4	(10.1)	38.0
Ending balance	(34.0)	(34.4)	(24.3)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(326.1)	(325.7)	(185.0)
Amounts reclassified from AOCI into income:
Total other comprehensive income (loss), net of income taxes	(139.3)	(0.4)	(140.7)
Ending balance	$ (465.4)	$ (326.1)	$ (325.7)