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Derivative Financial Instruments (Details 3) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Derivative [Line Items]    
Cash collateral on deposit with derivative counterparties $ 0 $ 0
Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset 3,000,000 16,000,000
Derivative, Collateral, Obligation to Return Securities 0 0
Derivative, Collateral, Obligation to Return Cash 0 0
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election 3,000,000 16,000,000
Derivative Liability 0 (47,000,000)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction 0 0
Cash collateral on deposit with derivative counterparties 0 0
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election 0 (47,000,000)
Derivative Assets (Liabilities), at Fair Value, Net 3,000,000 (31,000,000)
Net Derivative (Asset) Liability, Not Subject to Master Netting Arrangement Deduction 0 0
Derivative, Collateral, Obligation to Return Cash (Right to Reclaim Cash) 0 0
Net Derivative Asset (Liability), Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election $ 3,000,000 $ (31,000,000)