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Income taxes
 9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Income taxes 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 %
On July 4, 2025, the U.S. government enacted the One Big Beautiful Bill Act (OBBBA). The OBBBA provides changes to U.S. federal tax law, including expensing of U.S. research expenditures and eligible capital expenditures, increasing the U.S. CHIPS Act investment tax credit and changing other tax provisions. The effects of the new law are reflected in the consolidated financial statements as of and for the periods ended September 30, 2025.
The effective tax rate differs from the 21% U.S. statutory corporate tax rate due to the effect of U.S. tax benefits, including the effect of OBBBA.