Leases (Operating Lease Assets and Liabilities ) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease assets	$ 1,619	$ 1,745
Operating lease, right-of-use asset, statement of financial position [Extensible Enumeration]	Other	Other
Operating lease liabilities	$ 1,870	$ 1,998
Operating lease, liability, statement of financial position [Extensible Enumeration]	Accrued expenses and other liabilities	Accrued expenses and other liabilities