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Derivatives - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 10,973,000,000		$ 11,224,000,000
Derivative, Collateral, Right to Reclaim Cash	1,000,000		2,000,000
Derivative, Fair Value, Net	(14,000,000)		(42,000,000)
Cash collateral held	13,000,000		7,000,000
Securities Received as Collateral	6,000,000		5,000,000
Collateral Securities Repledged, Delivered, or Used	0		0
Collateral Pledged
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Cash	21,000,000		12,000,000
Asset Pledged as Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Collateral, Right to Reclaim Securities	28,000,000		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	24,000,000		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
AOCI Attributable to Parent [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	8,000,000
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	8,326,000,000		8,447,000,000
Derivative, Fair Value, Net	(28,000,000)		(48,000,000)
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	7,200,000,000		7,200,000,000
Not Designated as Hedging Instrument | Commodity Option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	241,000,000		0
Derivative, Cost of Hedge	10,000,000
Derivative, Fair Value, Net	$ 0		$ 0

X

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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The carrying value as of the balance sheet date of securities received as collateral from a counterparty that were re-pledged, sold, delivered or otherwise reused by the entity.

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Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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Amount of right to receive securities collateral under master netting arrangements that have not been offset against derivative liabilities.

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The premium (cost) of a hedge, expensed during the period.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Nominal or face amount used to calculate payment on derivative.

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Fair value of collateral permitted, by contact or custom, to be sold or re-pledged.

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The amount of loss reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period.

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