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Investments - Recorded Investment in CMLs by LTV and DSC Ratio Categories (Details) - Commercial mortgage loans - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 2,237 | $ 2,174
% of Total | 100.00% | 100.00%
Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 2,147 | $ 2,265
% of Total | 100.00% | 100.00%
Greater than 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 2,198 | $ 2,132
1.00 - 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 30 | 33
Greater than 1.00 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 9 | 9
LTV Less Than 50 % |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 638 | $ 668
% of Total | 29.00% | 31.00%
LTV Less Than 50 % | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 631 | $ 745
% of Total | 29.00% | 33.00%
LTV Less Than 50 % | Greater than 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 608 | $ 626
LTV Less Than 50 % | 1.00 - 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 21 | 33
LTV Less Than 50 % | Greater than 1.00 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 9 | 9
LTV 50 to 60% |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 512 | $ 470
% of Total | 23.00% | 22.00%
LTV 50 to 60% | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 494 | $ 481
% of Total | 23.00% | 21.00%
LTV 50 to 60% | Greater than 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 512 | $ 470
LTV 50 to 60% | 1.00 - 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 0 | 0
LTV 50 to 60% | Greater than 1.00 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 0 | 0
LTV 60% to 75% |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 1,078 | $ 1,036
% of Total | 48.00% | 47.00%
LTV 60% to 75% | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 1,016 | $ 1,039
% of Total | 47.00% | 46.00%
LTV 60% to 75% | Greater than 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 1,078 | $ 1,036
LTV 60% to 75% | 1.00 - 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 0 | 0
LTV 60% to 75% | Greater than 1.00 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 0 | $ 0
LTV 75% to 85% |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 9 |
% of Total | 1.00% |
LTV 75% to 85% | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 6 |
% of Total | 1.00% |
LTV 75% to 85% | Greater than 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 0 |
LTV 75% to 85% | 1.00 - 1.25 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | 9 |
LTV 75% to 85% | Greater than 1.00 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Gross Carrying Value | $ 0 |

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