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v3.22.1

Investments (Narrative) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) loan security item | Dec. 31, 2021 USD ($) loan security item
Investments [Line Items] |  |
Increase (decrease) in gross AFS securities unrealized losses | $ 2,500.0 |
Number of partnerships in alternative investment portfolio | item | 318 | 311
Alternative investments as a percentage of overall invested assets | 2.00% | 2.00%
Amortized cost | $ 107,622.0 | $ 105,177.0
Fair Value | 110,695.0 | 118,746.0
Fair value of collateral received that we are permitted to sell or re-pledge | 22.0 |
Investment commitments | 3,100.0 |
Investment commitments for limited partnerships | 1,500.0 |
Investment commitments for mortgage loans on real estate | 740.0 |
Investment commitments for private placements | $ 854.0 |
Minimum [Member] |  |
Investments [Line Items] |  |
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements | 80.00% |
Maximum [Member] |  |
Investments [Line Items] |  |
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements | 95.00% |
Federal Home Loan Mortgage Corporation [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Fair value | $ 857,000.0 | $ 953,000.0
Federal National Mortgage Association [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Fair value | $ 854.0 |
Corporate Bonds [Member] |  |
Investments [Line Items] |  |
Percentage of fair value rated as investment grade | 96.00% | 96.00%
Corporate Bonds [Member] | External Credit Rating, Non Investment Grade [Member] |  |
Investments [Line Items] |  |
Amortized cost |  | $ 3,700.0
Fair Value | $ 3,600.0 | 3,800.0
Federal National Mortgage Association [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Fair value |  | $ 926.0
Federal National Mortgage Association [Member] | Federal Home Loan Mortgage Corporation [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 1.00% | 1.00%
Federal National Mortgage Association [Member] | Federal National Mortgage Association [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 1.00% | 1.00%
Federal National Mortgage Association [Member] | Consumer Non-Cyclical Industry [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Fair value | $ 17,800.0 | $ 19,600.0
Concentration risk, percentage | 12.00% | 13.00%
Federal National Mortgage Association [Member] | Financial Service [Member] |  |
Investments [Line Items] |  |
Fair value | $ 18.1 | $ 19.2
Federal National Mortgage Association [Member] | Financial Service [Member] | Investments [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 13.00% | 12.00%
Commercial [Member] |  |
Investments [Line Items] |  |
Number of impaired loans | security | 4 | 4
Impaired financing receivable, principal balance | $ 1.0 | $ 1.0
Commercial [Member] | Federal National Mortgage Association [Member] | Geographic Concentration Risk [Member] | Mortgage Loans On Real Estate [Member] | California [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 26.00% | 26.00%
Commercial [Member] | Federal National Mortgage Association [Member] | Geographic Concentration Risk [Member] | Mortgage Loans On Real Estate [Member] | Texas [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 9.00% | 9.00%
Residential [Member] |  |
Investments [Line Items] |  |
Number of loans past due | loan | 63 | 65
Number of impaired loans | loan | 46 | 50
Impaired financing receivable, principal balance | $ 18.0 | $ 22.0
Number Of Loans In Foreclosure | loan | 38 | 34
Mortgage Loans in Process of Foreclosure, Amount | $ 17.0 | $ 15.0
Residential [Member] | Federal National Mortgage Association [Member] | Geographic Concentration Risk [Member] | Mortgage Loans On Real Estate [Member] | California [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 21.00% | 22.00%
Residential [Member] | Federal National Mortgage Association [Member] | Geographic Concentration Risk [Member] | Mortgage Loans On Real Estate [Member] | Florida [Member] |  |
Investments [Line Items] |  |
Concentration risk, percentage | 12.00% | 14.00%

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