Income taxes

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Income taxes

Income taxes

Provision for income taxes is based on the following:

	For Three Months Ended						For Nine Months Ended
	September 30,						September 30,
	2023			2022			2023			2022
Taxes calculated using the estimated annual effective tax rate	$	229		$	391		$	794		$	1,147
Discrete tax items	(16)			(28)			(63)			(69)
Provision for income taxes	$	213		$	363		$	731		$	1,078
Effective tax rate	11		%	14		%	12		%	14		%

The effective tax rate differs from the 21% U.S. statutory corporate tax rate due to the effect of U.S. tax benefits.