Derivative Financial Instruments - Offsetting Derivative Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative assets
Gross Amount Recognized in the Consolidated Balance Sheets	$ 2,896	$ 2,862
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(837)	(621)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(548)	(755)
Net Amount	1,511	1,486
Derivative liabilities
Gross Amount Recognized in the Condensed Consolidated Balance Sheets	2,013	1,072
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Derivatives	(837)	(621)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral	(712)	(221)
Net Amount	$ 464	$ 230

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