Stockholders' equity - ASR - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	2 Months Ended	6 Months Ended
	Dec. 07, 2022	Aug. 24, 2022	Mar. 02, 2022	Jul. 12, 2022	Sep. 30, 2022	Aug. 26, 2022	Feb. 28, 2022
Accelerate share repurchase
Stockholders Equity Note [Line Items]
Stock repurchase program authorized amount					$ 231	$ 231	$ 400
Accelerated share repurchases price paid per share				$ 78.9443
Accelerated share repurchase completed				$ 400	$ 400
Initial shares received as part of an accelerated share repurchase program			3,483,942
Additional common shares repurchased				1,582,922
Common shares attributable to ASR				5,066,864
Accelerate share repurchase | Treasury stock
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments			$ 320	$ 120
Accelerate share repurchase | Capital surplus (reduction)
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments			$ (80)	$ 120
August ASR
Stockholders Equity Note [Line Items]
Stock repurchase program authorized amount		$ 231
Accelerated share repurchases price paid per share	$ 72.6583
Initial shares received as part of an accelerated share repurchase program		2,339,241
Additional common shares repurchased	840,024
Common shares attributable to ASR	3,179,265
August ASR | Treasury stock
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments	$ 60	$ 185
August ASR | Capital surplus (reduction)
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments	$ 60	$ (46)