Income taxes

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Income taxes

Income taxes

Provision for income taxes is based on the following:

	For Three Months Ended
	March 31,
	2023			2022
Taxes calculated using the estimated annual effective tax rate	$	276		$	361
Discrete tax items	(38)			(36)
Provision for income taxes	$	238		$	325
Effective tax rate	12		%	13		%

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