Net income per common share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended		2 Months Ended	3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 07, 2022	Sep. 09, 2021	May 03, 2021	Aug. 24, 2022	Jan. 30, 2020	Mar. 02, 2022	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Jul. 12, 2022	Dec. 31, 2022	Feb. 28, 2022	Dec. 31, 2021	Dec. 31, 2020
Accelerate share repurchase
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Initial shares received as part of an accelerated share repurchase program			3,785,831		7,055,919	3,483,942			3,483,942
Stock repurchase program authorized amount			$ 350		$ 500							$ 400
Additional common shares repurchased		828,965						1,582,922		1,582,922
Accelerated share repurchases price paid per share		$ 75.8430						$ 78.94		$ 78.9443
Accelerated share repurchases settlement receipt							$ 631	$ 400			$ 631		$ 350	$ 500
August ASR
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Initial shares received as part of an accelerated share repurchase program				2,339,241				2,339,241
Stock repurchase program authorized amount				$ 231
Additional common shares repurchased	840,024						840,024
Accelerated share repurchases price paid per share	$ 72.6583										$ 72.66
Accelerated share repurchases settlement receipt							$ 231				$ 231