Commitments and Contingencies	9 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Matters We are involved in legal proceedings that are incidental to our business and may include administrative or judicial actions. Some of these legal proceedings involve governmental authorities and relate to environmental matters. For further information, see Environmental below. While it is not possible to predict or determine with certainty the outcome of any legal proceeding, we believe the outcome of any of these proceedings, or all of them combined, will not result in a material adverse effect on our consolidated results of operations, financial condition, or cash flows. In late 2013, Afton Chemical Corporation (Afton) initiated a voluntary self-audit of its compliance with certain sections of Toxic Substances Control Act (TSCA) under the Environmental Protection Agency's (EPA) audit policy (Audit Policy). Afton concluded its self-audit, sending its notice of this conclusion to the EPA on August 1, 2018. Any known potential findings and/or violations were disclosed on or before the conclusion of the self-audit. In August 2014, the EPA began an EPA TSCA inspection of both Afton and Ethyl. To date, however, the EPA has not noticed Afton or Ethyl of any findings, violations, or the conclusion of this inspection. While it is not possible to predict or determine with certainty the outcomes of Afton’s self-audit or the EPA’s inspection, we do not believe that any disclosures or findings identified as a result of Afton’s self-audit or the EPA’s TSCA inspection will have a material adverse effect on our consolidated results of operations, financial condition, or cash flows. Environmental We are involved in environmental proceedings and potential proceedings relating to soil and groundwater contamination, disposal of hazardous waste, and other environmental matters at several of our current or former facilities, or at third-party sites where we have been designated as a potentially responsible party (PRP). While we believe we are currently adequately accrued for known environmental issues, it is possible that unexpected future costs could have a significant impact on our financial position, results of operations, and cash flows. Our total accruals for environmental remediation, dismantling, and decontamination were approximately $14 million at both September 30, 2018 and December 31, 2017. Of the total accrual, the current portion is included in accrued expenses and the noncurrent portion is included in other noncurrent liabilities on the Condensed Consolidated Balance Sheets. Our more significant environmental sites include a former TEL plant site in Louisiana (the Louisiana site) and a Houston, Texas plant site (the Texas site). Together, the amounts accrued on a discounted basis related to these sites represented approximately $8 million of the total accrual above at September 30, 2018 and $7 million at December 31, 2017, using discount rates ranging from 3% to 9% at September 30, 2018 and 4% to 9% at December 31, 2017. The aggregate undiscounted amount for these sites was $11 million at September 30, 2018 and $10 million at December 31, 2017. Of the total accrued for these two sites, the amount related to remediation of groundwater and soil for the Louisiana site was $4 million at September 30, 2018 and $3 million at December 31, 2017. The amount related to remediation of groundwater and soil for the Texas site was $4 million at both September 30, 2018 and December 31, 2017. In 2000, the EPA named us as a PRP under Superfund law for the clean-up of soil and groundwater contamination at the five grouped disposal sites known as "Sauget Area 2 Sites" in Sauget, Illinois. Without admitting any fact, responsibility, fault, or liability in connection with this site, we are participating with other PRPs in site investigations and feasibility studies. In December 2013, the EPA issued its Record of Decision (ROD) confirming its remedies for the selected Sauget Area 2 Sites. In August 2017, the EPA issued a Special Notice Letter to over 75 PRPs notifying them of potential liability and encouraging the PRPs to voluntarily perform or finance the response actions detailed in the ROD. We have accrued our estimated proportional share of the remedial costs and expenses addressed in the ROD. We do not believe there is any additional information available as a basis for revision of the liability that we have established at September 30, 2018. The amount accrued for this site is not material.

Commitments and Contingencies

Legal Matters

We are involved in legal proceedings that are incidental to our business and may include administrative or judicial actions. Some of these legal proceedings involve governmental authorities and relate to environmental matters. For further information, see Environmental below.

While it is not possible to predict or determine with certainty the outcome of any legal proceeding, we believe the outcome of any of these proceedings, or all of them combined, will not result in a material adverse effect on our consolidated results of operations, financial condition, or cash flows.

In late 2013, Afton Chemical Corporation (Afton) initiated a voluntary self-audit of its compliance with certain sections of Toxic Substances Control Act (TSCA) under the Environmental Protection Agency's (EPA) audit policy (Audit Policy). Afton concluded its self-audit, sending its notice of this conclusion to the EPA on August 1, 2018. Any known potential findings and/or violations were disclosed on or before the conclusion of the self-audit. In August 2014, the EPA began an EPA TSCA inspection of both Afton and Ethyl. To date, however, the EPA has not noticed Afton or Ethyl of any findings, violations, or the conclusion of this inspection. While it is not possible to predict or determine with certainty the outcomes of Afton’s self-audit or the EPA’s inspection, we do not believe that any disclosures or findings identified as a result of Afton’s self-audit or the EPA’s TSCA inspection will have a material adverse effect on our consolidated results of operations, financial condition, or cash flows.

Environmental

We are involved in environmental proceedings and potential proceedings relating to soil and groundwater contamination, disposal of hazardous waste, and other environmental matters at several of our current or former facilities, or at third-party sites where we have been designated as a potentially responsible party (PRP). While we believe we are currently adequately accrued for known environmental issues, it is possible that unexpected future costs could have a significant impact on our financial position, results of operations, and cash flows. Our total accruals for environmental remediation, dismantling, and decontamination were approximately $14 million at both September 30, 2018 and December 31, 2017. Of the total accrual, the current portion is included in accrued expenses and the noncurrent portion is included in other noncurrent liabilities on the Condensed Consolidated Balance Sheets.

Our more significant environmental sites include a former TEL plant site in Louisiana (the Louisiana site) and a Houston, Texas plant site (the Texas site). Together, the amounts accrued on a discounted basis related to these sites represented approximately $8 million of the total accrual above at September 30, 2018 and $7 million at December 31, 2017, using discount rates ranging from 3% to 9% at September 30, 2018 and 4% to 9% at December 31, 2017. The aggregate undiscounted amount for these sites was $11 million at September 30, 2018 and $10 million at December 31, 2017. Of the total accrued for these two sites, the amount related to remediation of groundwater and soil for the Louisiana site was $4 million at September 30, 2018 and $3 million at December 31, 2017. The amount related to remediation of groundwater and soil for the Texas site was $4 million at both September 30, 2018 and December 31, 2017.

In 2000, the EPA named us as a PRP under Superfund law for the clean-up of soil and groundwater contamination at the five grouped disposal sites known as "Sauget Area 2 Sites" in Sauget, Illinois. Without admitting any fact, responsibility, fault, or liability in connection with this site, we are participating with other PRPs in site investigations and feasibility studies. In December 2013, the EPA issued its Record of Decision (ROD) confirming its remedies for the selected Sauget Area 2 Sites. In August 2017, the EPA issued a Special Notice Letter to over 75 PRPs notifying them of potential liability and encouraging the PRPs to voluntarily perform or finance the response actions detailed in the ROD. We have accrued our estimated proportional share of the remedial costs and expenses addressed in the ROD. We do not believe there is any additional information available as a basis for revision of the liability that we have established at September 30, 2018. The amount accrued for this site is not material.