Accounting Policies (Details) $ in Millions		3 Months Ended
		Mar. 31, 2025 USD ($) country	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
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]
Adjustment from Net cash provided (used) by investing activities to Net increase (decrease) in cash, cash equivalents and restricted cash	[1]	$ (7,851)	$ 8,820
Net change in Interest-earning deposits with banks		(3,551)	7,430
Cash, cash equivalents and restricted cash		$ 38,400	59,545	$ 46,251	$ 50,725
Revision of Prior Period, Reclassification, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment from Net cash provided (used) by investing activities to Net increase (decrease) in cash, cash equivalents and restricted cash			9,800
Cash, cash equivalents and restricted cash			53,600		$ 43,800
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net change in Interest-earning deposits with banks			$ 9,800

[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.