FINANCING ARRANGEMENTS Schedule of Long Term Debt Redemption Price (Details) - Senior secured notes	12 Months Ended
Dec. 31, 2015
Senior unsecured notes, at 5.125%, due June 1, 2021
Debt Instrument [Line Items]
2016	102.563%
2017	101.281%
2018 and thereafter	100.00%
Senior unsecured notes, at 5.25%, due August 1, 2020
Debt Instrument [Line Items]
2016	102.625%
2017	101.313%
2018 and thereafter	100.00%

Represents the redemption price as a percentage of the principal amount at which the debt instrument may be redeemed during the 12-month period commencing on August 15, 2014 and thereafter.

No definition available.

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Namespace Prefix:	clh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration