XML 64 R54.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Instruments - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 EUR (€) DerivativeContract | Dec. 31, 2017 DerivativeContract
Senior Notes |  |
Financial Instrument At Fair Value [Line Items] |  |
Debt instrument base principal amount | € 1,000 |
Debt instrument estimated market price per €1000 principal amount | € 1,029 |
Currency Forward Contracts |  |
Financial Instrument At Fair Value [Line Items] |  |
Number of derivative contacts outstanding | DerivativeContract | 0 | 0

X
- Definition Debt instrument base principal amount. + References No definition available. + Details
Name: | kro_DebtInstrumentBasePrincipalAmount
Namespace Prefix: | kro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt instrument estimated market price per base principal amount. + References No definition available. + Details
Name: | kro_DebtInstrumentEstimatedMarketPricePerBasePrincipalAmount
Namespace Prefix: | kro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financial instrument at fair value. + References No definition available. + Details
Name: | kro_FinancialInstrumentAtFairValueLineItems
Namespace Prefix: | kro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of derivative contracts outstanding. + References No definition available. + Details
Name: | kro_NumberOfDerivativeContractsOutstanding
Namespace Prefix: | kro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |