Derivative Financial Instruments - Offsetting Derivative Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative assets
Gross Amount Recognized in the Condensed Consolidated Balance Sheets	$ 3,303	$ 3,171
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(1,214)	(1,405)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(1,289)	(887)
Net Amount	800	879
Derivative liabilities
Gross Amount Recognized in the Condensed Consolidated Balance Sheets	3,772	3,951
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(1,214)	(1,405)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(221)	(406)
Net Amount	$ 2,337	$ 2,140