SEGMENT INFORMATION - Geographic Area Data (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales	$ 2,368.4	$ 2,001.7	$ 2,236.3	$ 1,593.6	$ 1,117.8	$ 1,077.8	$ 1,111.7	$ 1,056.2	$ 8,200.0	$ 4,363.5	$ 3,881.7
Long-Lived Assets	1,655.8				563.8				1,655.8	563.8	574.0
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									3,381.0	1,460.3	1,323.8
Long-Lived Assets	1,089.8				204.3				1,089.8	204.3	211.6
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									376.2	395.8	356.5
Long-Lived Assets	55.5				54.8				55.5	54.8	57.7
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									340.0	314.7	208.8
Long-Lived Assets	77.7				75.5				77.7	75.5	71.7
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									733.3	279.0	279.0
Long-Lived Assets	13.2				5.3				13.2	5.3	5.8
Australia
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									296.4	173.5	136.1
Long-Lived Assets	12.1				9.6				12.1	9.6	10.5
Mexico
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									356.6	200.6	160.0
Long-Lived Assets	23.7				9.2				23.7	9.2	9.1
France
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									294.3	247.8	237.5
Long-Lived Assets	58.9				56.7				58.9	56.7	57.8
India
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									504.2	178.5	137.8
Long-Lived Assets	159.2				12.8				159.2	12.8	12.5
China
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									290.4	170.3	178.1
Long-Lived Assets	34.5				33.4				34.5	33.4	36.4
Other international
Revenues From External Customers And Long Lived Assets [Line Items]
Total net sales									1,627.6	943.0	864.1
Long-Lived Assets	$ 131.2				$ 102.2				$ 131.2	$ 102.2	$ 100.9