Derivative Instruments and Hedging Activities (Credit Risk-Related Contingent Features) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Credit Risk-Related Contingent Features [Line Items]
Derivative Liability, Fair Value of Collateral	$ 0	$ 6
Derivative, Collateral, Right to Reclaim Cash	$ 0	$ 6

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_DerivativeCollateralRightToReclaimCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant