| Component: (Network and Table) | |
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| Network | 100380 - Disclosure - Employee Benefit Plans (Tables) (http://www.kronosww.com/20161231/taxonomy/role/DisclosureEmployeeBenefitPlansTables) |
| Table | Statement [Table] |
| Reporting Entity [Axis] | 0001257640 (http://www.sec.gov/CIK) |
| Statement [Line Items] | Period [Axis] | |||||||||||||||
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2016-01-01 - 2016-12-31 | ||||||||||||||||
| Defined Contribution Plan Type | ||||||||||||||||
| Defined Contribution Plan Type | Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||||||||||
| Defined Benefit Plan and Other Postretirement Benefit Plan | Investment | |||||||||||||||
| CMRT | Composition of Pension Plan Assets | At December 31, 2015 and 2016, substantially all of the assets attributable to our U.S. plan were invested in the Combined Master Retirement Trust (CMRT), a collective investment trust sponsored by Contran to permit the collective investment by certain master trusts that fund certain employee benefits plans sponsored by Contran and certain of its affiliates. For 2014, 2015 and 2016, the long-term rate of return assumption for plan assets invested in the CMRT was 7.5%, based on the long-term asset mix of the assets of the CMRT and the expected long-term rates of return for such asset components as well as advice from Contran’s actuaries. The CMRT unit value is determined semi-monthly, and the plans have the ability to redeem all or any portion of their investment in the CMRT at any time based on the most recent semi-monthly valuation. However, the plans do not have the right to individual assets held by the CMRT and the CMRT has the sole discretion in determining how to meet any redemption request. For purposes of our plan asset disclosure, we consider the investment in the CMRT as a Level 2 input because (i) the CMRT value is established semi-monthly and the plans have the right to redeem their investment in the CMRT, in part or in whole, at any time based on the most recent value and (ii) observable inputs from Level 1 or Level 2 (or assets not subject to classification in the fair value hierarchy) were used to value approximately 91% and 92% of the assets of the CMRT at December 31, 2015 and 2016, respectively, as noted below. CMRT assets not subject to classification in the fair value hierarchy consist principally of certain investments measured at net asset value per share in accordance with ASC 820-10. The aggregate fair value of all of the CMRT assets, including funds of Contran and its other affiliates that also invest in the CMRT, and supplemental asset mix details of the CMRT are as follows:
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| Defined Contribution Plan Type | ||||||||||||||||
| Defined Contribution Plan Type | Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||||||||||
| Foreign Pension Plans, Defined Benefit | Investment | |||||||||||||||
| Investment | Funded Status of Defined Benefit Plan | The funded status of our non-U.S. defined benefit pension plans is presented in the table below.
| Components of Net Periodic Benefit Cost (Credit) | The components of our net periodic defined benefit pension cost for our non-U.S. defined benefit pension plans are presented in the table below. The amounts shown below for the amortization of prior service cost, net transition obligations and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes.
| Schedule of Defined Benefit Pension Plans Balances (for which Accumulated Benefit Obligation Exceeds Fair Value of Plan Assets) | Information concerning certain of our non-U.S. defined benefit pension plans (for which the ABO exceeds the fair value of plan assets as of the indicated date) is presented in the table below.
| Key Actuarial Assumptions Used | The weighted-average rate assumptions used in determining the actuarial present value of benefit obligations for our non-U.S. defined benefit pension plans as of December 31, 2015 and 2016 are presented in the table below.
The weighted-average rate assumptions used in determining the net periodic pension cost for our non-U.S. defined benefit pension plans for 2014, 2015 and 2016 are presented in the table below.
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| Defined Contribution Plan Type | ||||||||||||||||
| Defined Contribution Plan Type | Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||||||||||
| United States Pension Plans of US Entity, Defined Benefit | Investment | |||||||||||||||
| Investment | Funded Status of Defined Benefit Plan | The funded status of our U.S. defined benefit pension plan is presented in the table below.
| Components of Net Periodic Benefit Cost (Credit) | The components of our net periodic defined benefit pension cost for our U.S. defined benefit pension plan is presented in the table below. The amounts shown below for recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015 respectively, net of deferred income taxes.
| Key Actuarial Assumptions Used | The weighted-average rate assumptions used in determining the net periodic pension cost for our U.S. defined benefit pension plan for 2014, 2015 and 2016 are presented in the table below. The impact of assumed increases in future compensation levels also does not have an effect on the periodic pension cost as the plan is frozen with regards to compensation.
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| Defined Contribution Plan Type | ||||||||||||||||
| Defined Contribution Plan Type | Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||||||||||
| OPEB | Investment | |||||||||||||||
| Investment | Benefit Payments | Postretirement benefits other than pensions (OPEB) – We provide certain health care and life insurance benefits for eligible Canadian and U.S. retired employees. Certain of our Canadian employees may become eligible for such postretirement health care and life insurance benefits if they reach retirement age while working for us. In the U.S., employees who retired after 1998 are not entitled to any such benefits. The majority of all retirees are required to contribute a portion of the cost of their benefits and certain current and future retirees are eligible for reduced health care benefits at age 65. We have no OPEB plan assets, rather, we fund medical claims as they are paid. Contributions to our OPEB plans to cover benefit payments are expected to be the equivalent of:
| Funded Status of Defined Benefit Plan | The funded status of our OPEB plans is presented in the table below:
| Components of Net Periodic Benefit Cost (Credit) | The components of our periodic OPEB costs are presented in the table below. The amounts shown below for amortization of prior service credit and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes.
| Key Actuarial Assumptions Used | A summary of our key actuarial assumptions used to determine the net benefit obligation as of December 31, 2015 and 2016 are presented in the table below. The weighted average discount rate was determined using the projected benefit obligation as of such dates. The impact of assumed increases in future compensation levels does not have a material effect on the actuarial present value of the benefit obligation as substantially all of such benefits relate solely to eligible retirees, for which compensation is not applicable.
| Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss) | The table below details the changes in benefit obligations recognized in accumulated other comprehensive income (loss) during 2014, 2015 and 2016.
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| Defined Contribution Plan Type | ||||||||||||||||
| Defined Benefit Pension Plans | Defined Benefit Plans and Other Postretirement Benefit Plans | |||||||||||||||
| Defined Benefit Plan and Other Postretirement Benefit Plan | Investment | |||||||||||||||
| Investment | Benefit Payments | We expect to contribute the equivalent of approximately $14.8 million to all of our defined benefit pension plans during 2017. Benefit payments to plan participants out of plan assets are expected to be the equivalent of:
| Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss) | The table below details the changes in our consolidated other comprehensive income (loss) during 2014, 2015 and 2016.
| Composition of Pension Plan Assets | The composition of our December 31, 2015 and 2016 pension plan assets by asset category and fair value level is shown in the table below.
| Roll forward of Change in Fair Value of Level 3 Assets | A rollforward of the change in fair value of Level 3 assets follows.
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