Debt Instrument, Spread on Variable Rate, Period For Measurement Of Average Liquidity

No definition available.

Name:	clh_DebtInstrumentSpreadOnVariableRatePeriodForMeasurementOfAverageLiquidity
Namespace Prefix:	clh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Balance Type:	debit
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Balance Type:	debit
Period Type:	duration

- Definition

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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FINANCING ARRANGEMENTS - Additional Information (Details) - USD ($)			3 Months Ended		12 Months Ended
	Apr. 28, 2023	Jan. 24, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Loss on early extinguishment of debt			$ (2,362,000)	$ 0
Debt fair value			2,400,000,000		$ 2,400,000,000
2018 Swaps
Debt Instrument [Line Items]
Notional amount of interest rate swap agreements			350,000,000
Reclassification of gain from accumulated other comprehensive loss to interest expense		$ 8,300,000
Interest Rate Swap
Debt Instrument [Line Items]
Reclassification of gain from accumulated other comprehensive loss to interest expense			14,126,000
Derivative asset			39,700,000		60,600,000
Secured senior term loans due October 8, 2028 ("2028 Term Loans") \| 2022 Swaps
Debt Instrument [Line Items]
Notional amount of interest rate swap agreements					600,000,000
Unsecured debt \| Unsecured senior notes, at 6.375%, due February 1, 2031 ("2031 Notes")
Debt Instrument [Line Items]
Debt Instrument, face amount		500,000,000
Line of Credit \| Revolving credit facility
Debt Instrument [Line Items]
Borrowing on credit facility		114,000,000
Revolving credit facility maximum borrowing capacity			400,000,000
Debt outstanding			114,000,000		0
Available to borrow and outstanding letters of credit			153,900,000
Outstanding letters of credit			132,100,000
Line of Credit \| Revolving credit facility \| Subsequent Event
Debt Instrument [Line Items]
Period for measurement of average liquidity (in days)	30 days
Line of Credit \| Revolving credit facility \| Subsequent Event \| Minimum
Debt Instrument [Line Items]
Commitment fee (as a percent)	0.25%
Line of Credit \| Revolving credit facility \| Subsequent Event \| Maximum
Debt Instrument [Line Items]
Commitment fee (as a percent)	0.375%
Line of Credit \| Revolving credit facility \| Subsequent Event \| SOFR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.50%
Line of Credit \| Revolving credit facility \| Subsequent Event \| SOFR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.75%
Line of Credit \| Revolving credit facility \| Subsequent Event \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Line of Credit \| Revolving credit facility \| Subsequent Event \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.75%
Secured debt \| Secured senior term loans due June 30, 2024 ("2024 Term Loans")
Debt Instrument [Line Items]
Repayments of debt		$ 614,000,000
Secured debt \| Secured senior term loans due June 30, 2024 ("2024 Term Loans") \| 2018 Swaps
Debt Instrument [Line Items]
Debt outstanding			$ 350,000,000
Secured debt \| Secured senior term loans due October 8, 2028 ("2028 Term Loans") \| 2022 Swaps
Debt Instrument [Line Items]
Debt outstanding					$ 600,000,000
Effective interest rate (as a percent)					2.931%
Secured debt \| Secured senior term loans due October 8, 2028 ("2028 Term Loans") \| 2022 Swaps \| Through June 30, 2023
Debt Instrument [Line Items]
Derivative, fixed interest rate					0.931%
Secured debt \| Secured senior term loans due October 8, 2028 ("2028 Term Loans") \| 2022 Swaps \| From July 1, 2023 through September 30, 2027
Debt Instrument [Line Items]
Derivative, fixed interest rate					1.9645%
Secured debt \| Secured senior term loans due October 8, 2028 ("2028 Term Loans") \| Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)					2.00%