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Retirement Plans and Other Retiree Benefits - Additional Information, U.S. Plans (Details) - United States - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |
U.S. plans assets purchased/sold to Company | 0 | 0
Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of investments in Company's common stock | 7.00% | 7.00%
Dividends received by plans on the Company's common stock | $ 3 | $ 3

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- Definition The amount of dividends received by the defined benefit plan on the Company's common stock. + References No definition available. + Details
Name: | cl_DefinedBenefitPlanDividendsReceivedOnEmployerSecurities
Namespace Prefix: | cl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of equity securities of the defined benefit plan invested in the Company's common stock. + References No definition available. + Details
Name: | cl_DefinedBenefitPlanPercentageOfEquitySecuritiesInvestedInEmployerSecurities
Namespace Prefix: | cl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The increase/decrease of shares of common stock held by the pension plan as part of the plan assets due to investment/divestiture. + References No definition available. + Details
Name: | cl_DefinedBenefitPlanPlanAssetsPurchasedSold
Namespace Prefix: | cl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |