Other Financial Data - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic earnings per common share:
Earnings	$ 1,709	$ 1,363	$ 1,245
Weighted average common shares outstanding (in shares)	167.0	167.5	169.2
Per share amount (USD per share)	$ 10.23	$ 8.14	$ 7.36
Diluted earnings per common share:
Earnings	$ 1,709	$ 1,363	$ 1,245
Weighted average common shares outstanding (in shares)	167.0	167.5	169.2
Add effect of dilutive securities:
Share-based awards (in shares)	3.7	3.7	4.0
Diluted weighted average common shares outstanding (in shares)	172.1	171.9	173.6
Per share amount (USD per share)	$ 9.93	$ 7.93	$ 7.17
1.75% senior convertible notes due 2024
Add effect of dilutive securities:
Senior Convertible Notes (in shares)	1.5	0.7	0.4
Convertible Debt | 1.75% senior convertible notes due 2024
Add effect of dilutive securities:
Interest rate	1.75%