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New accounting standards (Policies)	3 Months Ended
New accounting standards (Policies)	Mar. 31, 2021
Accounting Changes and Error Corrections [Abstract]
New accounting standards	New tax standard On January 1, 2021, we implemented the FASB’s new standard to simplify the accounting for income taxes, which was issued in December 2019. The provisions of this new standard did not result in our having to record an impact upon adoption. Other There were no other new accounting standards that we expect to have a material impact to our financial position or results of operations upon adoption.