Stockholders' equity - ASR - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended	2 Months Ended	6 Months Ended
	Dec. 07, 2022	Sep. 09, 2021	May 03, 2021	Aug. 24, 2022	Mar. 02, 2022	Jul. 12, 2022	Dec. 31, 2022	Feb. 28, 2022	Dec. 31, 2021
Accelerate share repurchase
Stockholders Equity Note [Line Items]
Stock repurchased (Shares)		4,614,796				5,066,864
Stock repurchase program authorized amount			$ 350					$ 400
Accelerated share repurchases price paid per share		$ 75.8430				$ 78.9443
Accelerated share repurchases settlement payment							$ (631)		$ (350)
Initial shares received as part of an accelerated share repurchase program			3,785,831		3,483,942
Additional common shares repurchased		828,965				1,582,922
Accelerate share repurchase | Treasury stock
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments		$ 61	$ 280		$ 320	$ 120
Accelerate share repurchase | Capital surplus (reduction)
Stockholders Equity Note [Line Items]
Accelerated share repurchase adjustments		$ 61	$ (70)		$ (80)	$ 120
August ASR
Stockholders Equity Note [Line Items]
Stock repurchased (Shares)	3,179,265
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
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)