Derivative Financial Instruments - Offsetting Derivative Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative assets
Gross Amount Recognized in the Consolidated Balance Sheets	$ 2,772	$ 2,672
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(1,146)	(1,031)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(987)	(877)
Net Amount	639	764
Derivative liabilities
Gross Amount Recognized in the Consolidated Balance Sheets	3,223	2,999
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(1,146)	(1,031)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(177)	(159)
Net Amount	$ 1,900	$ 1,809