CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 5,697	$ 5,382	$ 18,391	$ 17,182
Expense:
Compensation and benefits	3,442	3,287	10,366	9,831
Other operating expenses	1,147	1,099	3,350	3,172
Operating expenses	4,589	4,386	13,716	13,003
Operating income	1,108	996	4,675	4,179
Other net benefit credits	68	62	201	180
Interest income	12	16	61	40
Interest expense	(154)	(145)	(469)	(427)
Investment income	1	1	3	6
Income before income taxes	1,035	930	4,471	3,978
Income tax expense	283	192	1,155	941
Net income before non-controlling interests	752	738	3,316	3,037
Less: Net income attributable to non-controlling interests	5	8	44	37
Net income attributable to the Company	$ 747	$ 730	$ 3,272	$ 3,000
Net income per share attributable to the Company:
Basic (in dollars per share)	$ 1.52	$ 1.48	$ 6.65	$ 6.07
Diluted (in dollars per share)	$ 1.51	$ 1.47	$ 6.59	$ 6.01
Average number of shares outstanding:
Basic (in shares)	492	494	492	494
Diluted (in shares)	496	499	496	499
Shares outstanding (in shares)	491	493	491	493