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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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DEBT - Components of Long-term Debt (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Aug. 31, 2019	Dec. 31, 2018	Sep. 07, 2016
Debt Instrument [Line Items]
Long-term debt			$ 3,194.2		$ 3,075.8
Less current portion			(288.0)		(348.1)
Long-term debt			2,906.2		2,727.7
Short-term borrowings			$ 2.2		$ 9.3
Weighted-average interest rate (as a percent)			8.30%		6.20%
2019 Term Loan Facility
Debt Instrument [Line Items]
Long-term debt			$ 187.1		$ 0.0
2018 Foreign Asset-Based Term Loan Credit Agreement due 2021
Debt Instrument [Line Items]
Long-term debt			82.3		82.7
Amended 2016 Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt			269.9		330.0
Less current portion			(269.9)		(330.0)
Amended 2016 Revolving Credit Facility \| Scenario, Forecast
Debt Instrument [Line Items]
Repayment of debt		$ 18.0
2016 Term Loan due 2023
Debt Instrument [Line Items]
Long-term debt			1,713.6		1,724.6
Repayment of debt	$ 18.0		18.0
5.75% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt			$ 498.1		496.6
Stated interest rate (as a percent)			5.75%	5.75%
6.25% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt			$ 442.8		441.4
Stated interest rate (as a percent)			6.25%			6.25%
Spanish Government Loan due 2025
Debt Instrument [Line Items]
Long-term debt			$ 0.4		$ 0.5