Derivative Assets And Liabilities Derivative Assets and Lianilities (Offsetting Agreements Netting Table) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Asset Derivatives	$ 616	$ 688
Derivative Liabilities	(464)	(549)
Derivative Asset, Fair Value, Amount Offset Against Collateral	(72)	(85)
Derivative Liability, Fair Value, Amount Offset Against Collateral	72	85
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(368)	(359)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	368	359
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	176	244
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	24	105
Without offsetting agreements [Member]
Asset Derivatives	6	0
Derivative Liabilities	(4)	(23)
OTC Contracts [Member]
Asset Derivatives	132	95
Derivative Liabilities	(80)	(108)
Broker cleared derivative contracts [Member]
Asset Derivatives	478	593
Derivative Liabilities	$ (380)	$ (418)

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

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