Accounting Policies (Details) $ in Millions		6 Months Ended
		Jun. 30, 2024 USD ($) country	Jun. 30, 2023 USD ($)	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]	$ (11,444)	$ 10,087
Increase in net cash provided (used) by investing activities		(6,585)	7,537
Interest-bearing deposits		1,716	5,166
Other investing activities, net		(357)	(445)
Cash, cash equivalents and restricted cash at end of period		$ 39,281	44,450	$ 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			10,900
Increase in net cash provided (used) by investing activities			10,900
Interest-bearing deposits			10,800
Other investing activities, net			(100)
Cash, cash equivalents and restricted cash at end of period			$ 38,200		$ 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.