CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 6,221	$ 5,876	$ 12,694	$ 11,800
Expense:
Compensation and benefits	3,454	3,337	6,924	6,544
Other operating expenses	1,125	1,082	2,203	2,073
Operating expenses	4,579	4,419	9,127	8,617
Operating income	1,642	1,457	3,567	3,183
Other net benefit credits	66	60	133	118
Interest income	12	10	49	24
Interest expense	(156)	(146)	(315)	(282)
Investment income	1	3	2	5
Income before income taxes	1,565	1,384	3,436	3,048
Income tax expense	425	337	872	749
Net income before non-controlling interests	1,140	1,047	2,564	2,299
Less: Net income attributable to non-controlling interests	15	12	39	29
Net income attributable to the Company	$ 1,125	$ 1,035	$ 2,525	$ 2,270
Net income per share attributable to the Company:
Basic (in dollars per share)	$ 2.28	$ 2.09	$ 5.13	$ 4.59
Diluted (in dollars per share)	$ 2.27	$ 2.07	$ 5.08	$ 4.55
Average number of shares outstanding:
Basic (in shares)	492	495	492	495
Diluted (in shares)	496	499	497	499
Shares outstanding (in shares)	492	494	492	494