Derivative Financial Instruments - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Asset Fair Value
Asset Fair Value	$ 904	$ 159
Less: Gross amounts offset in the Consolidated Balance Sheets, Asset Fair Value	0	0
Derivative assets	904	159
Less: Amounts subject to master netting agreements, Asset Fair Value	(72)	(13)
Less: Cash collateral pledged(received) subject to master netting agreements	(783)	(124)
Total net derivative fair value, Asset Fair Value	49	22
Liability Fair Value
Liability Fair Value	(912)	(486)
Less: Gross amounts offset in the Consolidated Balance Sheets, Liability Fair Value	0	0
Derivative liability	(912)	(486)
Less: Amounts subject to master netting agreements, Asset Liability Value	72	13
Less: Cash collateral pledged(received) subject to master netting agreements	6	0
Total net derivative fair value, Liability Fair Value	(834)	(473)
Variation margin, amount reducing derivative asset	106	376
Variation margin, amount reducing derivative liability	22	19
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	34,508	18,805
Asset Fair Value
Asset Fair Value	904	159
Liability Fair Value
Liability Fair Value	(912)	(486)
Not Designated as Hedging Instrument | Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	23,544	18,173
Asset Fair Value
Asset Fair Value	748	158
Liability Fair Value
Liability Fair Value	(781)	(482)
Not Designated as Hedging Instrument | Foreign currency forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	10,094	125
Asset Fair Value
Asset Fair Value	151	1
Liability Fair Value
Liability Fair Value	(130)	(4)
Not Designated as Hedging Instrument | Foreign exchange spot contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	242	0
Not Designated as Hedging Instrument | Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	870	507
Asset Fair Value
Asset Fair Value	5	0
Liability Fair Value
Liability Fair Value	$ (1)	$ 0