Share-Based Compensation Plans - Schedule of stock option activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Units
Outstanding, beginning of year (in shares)	13,021,427
Granted (in shares)	1,436,075
Exercised (in shares)	(1,515,836)
Forfeited or expired (in shares)	(48,254)
Outstanding, end of year (in shares)	12,893,412	13,021,427
Exercisable, end of year (in shares)	5,353,091
Weighted Average Exercise Price
Outstanding, beginning of year (in dollars per share)	$ 47.12
Granted (in dollars per share)	61.61
Exercised (in dollars per share)	45.10
Forfeited or expired (in dollars per share)	54.80
Outstanding, end of year (in dollars per share)	48.94	$ 47.12
Exercisable, end of year (in dollars per share)	$ 50.27
Stock Option Activity, Additional Disclosures
Weighted Average Remining Contractual Life	6 years 11 months 12 days	7 years 7 months 2 days
Weighted Average Remaining Contractual Life, options exercisable, end of year (years)	5 years 11 months 19 days
Aggregate Intrinsic Value, options outstanding, beginning of year
Aggregate Intrinsic Value, options outstanding, end of year	186
Aggregate Intrinsic Value, options exercisable, end of year	$ 70