CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 22,736	$ 20,720	$ 19,820
Expense:
Compensation and benefits	13,099	12,071	11,425
Other operating expenses	4,355	4,369	4,083
Operating expenses	17,454	16,440	15,508
Operating income	5,282	4,280	4,312
Other net benefits credits	239	235	277
Interest income	78	15	2
Interest expense	(578)	(469)	(444)
Investment income	5	21	61
Income before income taxes	5,026	4,082	4,208
Income tax expense	1,224	995	1,034
Net income before non-controlling interests	3,802	3,087	3,174
Less: Net income attributable to non-controlling interests	46	37	31
Net income attributable to the Company	$ 3,756	$ 3,050	$ 3,143
Net income per share attributable to the Company
Basic (in dollars per share)	$ 7.60	$ 6.11	$ 6.20
Diluted (in dollars per share)	$ 7.53	$ 6.04	$ 6.13
Average number of shares outstanding
Basic (in shares)	494	499	507
Diluted (in shares)	499	505	513
Shares outstanding (in shares)	492	495	504