LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Interest rate summary (Details)		3 Months Ended
		Mar. 31, 2019	Feb. 21, 2021	Nov. 01, 2019
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		0.026
2021 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.28%
Derivative, Average Fixed Interest Rate	[1]	0.31%
Debt Instrument, Guarantee Fee, Stated Percentage	[1]	1.66%
Debt Instrument, Interest Rate, All-In Rate	[1]	3.25%
2023 Euro Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.28%
Derivative, Average Fixed Interest Rate	[2]	0.28%
Debt Instrument, Guarantee Fee, Stated Percentage	[2]	2.19%
Debt Instrument, Interest Rate, All-In Rate	[2]	3.75%
2023 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]	6.10%
Debt Instrument, Interest Rate, All-In Rate	[3]	6.10%
Scenario, Forecast [Member] | 2021 Euro Loan [Member]
Debt Instrument [Line Items]
Derivative, Average Fixed Interest Rate	[1]			0.47%
Scenario, Forecast [Member] | 2023 Euro Loan [Member]
Debt Instrument [Line Items]
Derivative, Average Fixed Interest Rate	[2]		0.97%

[1] Effective until November 1, 2019. From November 1, 2019 through maturity on November 1, 2021, the rate fixed pursuant to interest rate hedges will increase to 0.47%, with a corresponding decrease in the Guarantee Fee rate, such that the all-in borrowing rate remains 3.25% if our net leverage ratio remains unchanged.

[2] Effective until February 19, 2021. From February 19, 2021 through maturity on April 26, 2023, the rate fixed pursuant to interest rate hedges will increase to 0.97%, with a corresponding decrease in the Guarantee Fee rate, such that the all-in borrowing rate remains 3.75% if our net leverage ratio remains unchanged.

[3] Based on the three month LIBOR of 2.60% as at March 31, 2019.