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Other Operating Income (Expense), Net - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2016
Other Operating Income And Expense [Line Items] |  |  |  |
Insurance settlements receivable | $ 0 |  |  |
Other Operating Income (Expense), Net |  |  |  |
Other Operating Income And Expense [Line Items] |  |  |  |
Income received from settlement of business interruption insurance claim | $ 900,000 | $ 1,400,000 | $ 2,000,000 | $ 3,400,000

X
- Definition Gain (loss) on settlement of business interruption insurance claim. + References No definition available. + Details
Name: | kro_GainLossOnSettlementOfBusinessInterruptionInsuranceClaim
Namespace Prefix: | kro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Other Operating Income and Expense. + References No definition available. + Details
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Namespace Prefix: | kro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References No definition available. + Details
Name: | us-gaap_InsuranceSettlementsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherOperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |