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Income taxes (Tables)
9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Schedule of Provision for Income Taxes
Provision for income taxes is based on the following:
For Three Months EndedFor Nine Months Ended
September 30,September 30,
 2025202420252024
Taxes calculated using the estimated annual effective tax rate$249 $227 $614 $573 
Discrete tax items(29)(35)(114)(73)
Provision for income taxes$220 $192 $500 $500 
Effective tax rate14 %12 %12 %12 %