XML 31 R20.htm IDEA: XBRL DOCUMENT v3.21.2
Income taxes (Tables)
9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Provision for income taxes Provision for income taxes is based on the following:
For Three Months EndedFor Nine Months Ended
September 30,September 30,
 2021202020212020
Taxes calculated using the estimated annual effective tax rate$337 $231 $934 $561 
Discrete tax items(9)(109)(378)
Provision for income taxes$328 $234 $825 $183 
Effective tax rate14 %15 %13 %%