Stockholders' equity - Additional Information (Details) - $ / shares	3 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023
Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 1.30	$ 1.30	$ 1.24	$ 1.24
Cash dividends paid per common share (in dollars per share)	$ 1.30	$ 1.30	$ 1.24	$ 1.24