Quarterly report pursuant to Section 13 or 15(d)

Income taxes - Narrative (Details)

v3.21.2
Income taxes - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Income taxes          
Effective income tax rate 11.30% 27.80% 7.70% 31.90% 11.00%
Foreign rate differential     21.00%