Derivatives - Additional Information (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 10,503,000,000			$ 10,503,000,000		$ 11,224,000,000
Derivative, Collateral, Right to Reclaim Cash	0			0		2,000,000
Derivative, Fair Value, Net	34,000,000			34,000,000		(42,000,000)
Cash collateral held	40,000,000			40,000,000		7,000,000
Securities Received as Collateral	17,000,000			17,000,000		5,000,000
Collateral Securities Repledged, Delivered, or Used	0			0		0
Collateral Pledged
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Cash	16,000,000			16,000,000		12,000,000
Asset Pledged as Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Securities	16,000,000			16,000,000		48,000,000
Over the Counter [Member] | Asset Pledged as Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Securities	21,000,000			21,000,000		82,000,000
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring	0		$ 0	0	$ 0
AOCI Attributable to Parent [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months				(2,000,000)
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	7,824,000,000			7,824,000,000		8,447,000,000
Derivative, Fair Value, Net	(18,000,000)			(18,000,000)		(48,000,000)
Non-qualifying foreign currency derivatives	14,000,000		(29,000,000)	61,000,000	6,000,000
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	6,600,000,000			6,600,000,000		$ 7,200,000,000
Not Designated as Hedging Instrument | Commodity Option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Cost of Hedge		$ 10,000,000
Non-qualifying foreign currency derivatives	$ 0		$ 0	$ 14,000,000	$ 0