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New accounting pronouncements
 3 Months Ended
Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]  
New accounting pronouncements In December 2019, the Financial Accounting Standards Board issued Accounting Standards Update No. 2019-12, Simplifying the Accounting for Income Taxes. This standard addressed several specific areas of accounting for income taxes. We adopted this standard on January 1, 2021. Portions of the standard were adopted prospectively and certain aspects were required to be adopted using the modified retrospective approach. Adoption of this standard did not require an adjustment to retained earnings and did not have a significant impact on our results of operations or financial position.