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Commitments and contingent liabilities	12 Months Ended
Commitments and contingent liabilities	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingent liabilities	Commitments and contingent liabilities Environmental: We are subject to contingencies as a result of environmental laws and regulations that in the future may require us to take further action to correct the effects on the environment of prior disposal practices or releases of chemical or petroleum substances by us or other parties. Much of this liability results from the U.S. Comprehensive Environmental Response, Compensation and Liability Act, often referred to as Superfund, the U.S. Resource Conservation and Recovery Act and similar state laws. These laws require us to undertake certain investigative and remedial activities at sites where we conduct or once conducted operations or at sites where Company-generated waste was disposed. Remediation activities vary substantially in duration and cost from site to site. The nature of these activities, and their associated costs, depend on the mix of unique site characteristics, evolving remediation technologies, the regulatory agencies involved and their enforcement policies, as well as the presence or absence of other potentially responsible parties. At December 31, 2019 and 2018, we have recorded $0.7 million and $0.8 million, respectively, in accrued liabilities and $6.2 million and $5.6 million, respectively in other liabilities relating to these matters. Considerable uncertainty exists with respect to these liabilities, and if adverse changes in circumstances occur, potential liability may exceed the amount accrued as of December 31, 2019. The time frame over which the accrued amounts may be paid out, based on past history, is estimated to be 10-15 years. Litigation: We are a party to various lawsuits and claims arising in the normal course of business. These lawsuits and claims include actions involving product liability, intellectual property, employment, environmental and other matters. As of December 31, 2019 and 2018, we have recorded accrued liabilities of $0.4 million and $0.6 million, respectively, in connection with such contingencies, representing its best estimate of the cost within the range of estimated possible losses that will be incurred to resolve these matters. Based on information currently available, advice of counsel, established reserves and other resources, we do not believe that the outcome of any outstanding litigation and claims is likely to be, individually or in the aggregate, material to our business, financial condition, results of operations or liquidity. However, in the event of unexpected further developments, it is possible that the ultimate resolution of these matters, or other similar matters, if unfavorable, may be materially adverse to our business, financial condition, results of operations or liquidity. Legal costs such as outside counsel fees and expenses are charged to selling, general and administrative expenses in the period incurred.