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Derivative Assets And Liabilities Derivative Assets and Lianilities (Offsetting Agreements Netting Table) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Asset Derivatives	$ 272	$ 168
Derivative Liabilities	(598)	(717)
Derivative Asset, Fair Value, Amount Offset Against Collateral	(43)	(44)
Derivative Liability, Fair Value, Amount Offset Against Collateral	43	44
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(150)	(64)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	150	64
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	79	60
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	405	609
Without offsetting agreements [Member]
Asset Derivatives	0	0
Derivative Liabilities	(387)	(448)
OTC Contracts [Member]
Asset Derivatives	53	53
Derivative Liabilities	(52)	(71)
Broker cleared derivative contracts [Member]
Asset Derivatives	219	115
Derivative Liabilities	$ (159)	$ (198)

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