Common stock transactions (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Billions		1 Months Ended	3 Months Ended
	Aug. 24, 2022	May 31, 2024	May 03, 2024	May 05, 2023
Common stock transactions
Cash dividend paid (in dollars per share)			$ 0.59	$ 0.59
Subsequent event
Common stock transactions
Cash dividend declared (in dollars per share)		$ 0.59
Common Stock | Pursuant to Authorized Repurchase Program
Common stock transactions
Common stock repurchase program, increase in the authorized amount	$ 2.0
Common stock repurchase authorization	$ 16.0
Shares acquired under share repurchase program			0.0