Accounting Policies (Details) $ in Millions		9 Months Ended
		Sep. 30, 2024 USD ($) country	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Accounting Policies [Abstract]
Number of countries outside the US where strategic international offices are held | country		4
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amount moved out of Net cash provided (used) by investing activities	[1]	$ (9,539)	$ 12,421
Increase in net cash provided (used) by investing activities		(10,367)	12,450
Interest-bearing deposits		9,245	6,141
Decrease in other investing activities, net, less than		(587)	(989)
Cash, cash equivalents and restricted cash at end of period		$ 41,186	46,784	$ 50,725	$ 34,363
Revision of Prior Period, Reclassification, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amount moved out of Net cash provided (used) by investing activities			14,200
Increase in net cash provided (used) by investing activities			14,200
Interest-bearing deposits			14,200
Decrease in other investing activities, net, less than			(100)
Cash, cash equivalents and restricted cash at end of period			$ 41,500		$ 27,300

[1] In the second quarter of 2024, we updated our policy for cash and cash equivalents to include interest-earning deposits with banks. See Note 1 Accounting Policies for additional information regarding this change to our cash and cash equivalents policy.