Represents the standard base rate charged for each 1,000 gallons of water supplied.

No definition available.

Name:	cwco_BaseWaterRatePer1000Gallons
Namespace Prefix:	cwco_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of consolidated gross profit from Cayman Water retail operations.

+ References

No definition available.

+ Details

Name:	cwco_CaymanWaterRetailOperationsPercentageOfGrossProfit
Namespace Prefix:	cwco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of consolidated revenue from Cayman Water retail operations.

+ References

No definition available.

+ Details

Name:	cwco_CaymanWaterRetailOperationsPercentageOfRevenue
Namespace Prefix:	cwco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

+ References

No definition available.

+ Details

Name:	cwco_CommitmentsAndContingenciesLineItems
Namespace Prefix:	cwco_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the fixed exchange rate used for currency conversion between Cayman Islands dollars and U.S. dollars.

+ References

No definition available.

+ Details

Name:	cwco_CurrencyConversionFixedExchangeRate
Namespace Prefix:	cwco_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the earliest period prior to the license expiration date during which the licensee may submit an application for renewal.

+ References

No definition available.

+ Details

Name:	cwco_EarliestRenewalApplicationPeriodBeforeLicenseExpirationDate
Namespace Prefix:	cwco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the gallons of water delivered per week,

+ References

No definition available.

+ Details

Name:	cwco_GallonsOfWaterDeliveredPerWeek
Namespace Prefix:	cwco_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the gallons of water supplied during the period.

+ References

No definition available.

+ Details

Name:	cwco_GallonsOfWaterSupplied
Namespace Prefix:	cwco_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the latest period prior to the license expiration date during which the company may submit an application for renewal.

+ References

No definition available.

+ Details

Name:	cwco_LatestRenewalApplicationPeriodBeforeLicenseExpirationDate
Namespace Prefix:	cwco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of delinquent account receivable balance

+ References

No definition available.

+ Details

Name:	cwco_PercentageOfDelinquentAccountsReceivableBalance
Namespace Prefix:	cwco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477802/946-310-45-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(5)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479196/954-310-45-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_AccountsReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_ConsolidatedEntitiesAxis=cwco_ConsolidatedWaterBahamasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=cwco_ResidentialConsumersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=cwco_First3000GallonsPerMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=cwco_Above3000GallonsPerMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=cwco_CommercialConsumersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=cwco_PublicAuthorityConsumersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=cwco_TruckedWaterConsumersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=cwco_BlueHillsPlantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=cwco_WindsorWaterPlantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and contingencies (Details) $ in Millions		3 Months Ended		6 Months Ended
Commitments and contingencies (Details) $ in Millions	Jun. 18, 2026 $ / gal gal	Jun. 30, 2026 USD ($) gal	Jun. 30, 2025	Jun. 30, 2026 USD ($) gal	Jun. 30, 2025	Dec. 31, 2025 USD ($)
Contingencies
Percentage of consolidated revenue from Cayman Water retail operations		26.00%	26.00%	27.00%	27.00%
Percentage of consolidated gross profit from Cayman Water retail operations		44.00%	38.00%	45.00%	42.00%
Exchange rate for conversion	1.2
Earliest renewal application period	36 months
Latest renewal application period	24 months
Percentage of delinquent account receivables		64.00%		64.00%		71.00%
CW-Bahamas
Contingencies
Accounts receivable \| $		$ 18.8		$ 18.8		$ 20.7
Residential consumers \| First 3000 gallons supplied or consumed per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	16.23
Gallons of water supplied	3,000
Residential consumers \| Above 3000 gallons per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	21.21
Gallons of water supplied	3,000
Commercial consumers \| First 3000 gallons supplied or consumed per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	19.9
Gallons of water supplied	3,000
Commercial consumers \| Above 3000 gallons per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	21.21
Gallons of water supplied	3,000
Public authority consumers \| First 3000 gallons supplied or consumed per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	17.77
Gallons of water supplied	3,000
Public authority consumers \| Above 3000 gallons per month
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	19.01
Gallons of water supplied	3,000
Trucked water consumers
Contingencies
Base rate for each 1,000 gallons of water supplied \| $ / gal	13.32
Blue Hills Water Works Plant \| CW-Bahamas
Contingencies
Gallons of water delivered per week		63,000,000		63,000,000
Windsor Water Plant \| CW-Bahamas
Contingencies
Gallons of water delivered per week		16,800,000		16,800,000