Contingencies

3 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Note 12. Contingencies

We are party to various legal actions in the normal course of business. In determining whether a pending matter is significant for financial reporting and disclosure purposes, we consider both quantitative and qualitative factors in order to assess materiality. We record a liability for claims to the extent that we can formulate a reasonable estimate of their costs and there is a reasonable probability of incurring significant costs or expenses. At March 31, 2019 and December 31, 2018, we had no liabilities established related to litigation as there were no significant claims which were probable and estimable. We have not historically had any significant litigation expense and are not currently subject to a significant claim.

Contingencies

We are party to various legal actions in the normal course of business. In determining whether a pending matter is significant for financial reporting and disclosure purposes, we consider both quantitative and qualitative factors in order to assess materiality. We accrue for certain liability claims to the extent we can formulate a reasonable estimate of their costs and there is a reasonable probability of incurring significant costs or expenses. At December 31, 2018 and December 31, 2017, we had no liabilities established related to litigation as there were no significant claims which were probable and estimable. We have not historically had any significant litigation expense and are not currently subject to a significant claim.