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Investments - Mortgage Loans Credit Ratings Indicator (Details) - Commercial Real Estate - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | $ 1,044 | $ 902
2022 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 326 |
2021 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 247 | 255
2020 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 36 | 48
2019 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 11 | 40
2018 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 55 | 75
Prior |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 369 | 484
1 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 15 | 28
1 | 2022 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 |
1 | 2021 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
1 | 2020 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
1 | 2019 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
1 | 2018 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
1 | Prior |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 15 | 28
2 to 4 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 1,022 | 861
2 to 4 | 2022 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 326 |
2 to 4 | 2021 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 247 | 255
2 to 4 | 2020 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 36 | 48
2 to 4 | 2019 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 11 | 40
2 to 4 | 2018 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 52 | 72
2 to 4 | Prior |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 350 | 446
5 and 6 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 7 | 13
5 and 6 | 2022 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 |
5 and 6 | 2021 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
5 and 6 | 2020 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
5 and 6 | 2019 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
5 and 6 | 2018 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 3 | 3
5 and 6 | Prior |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 4 | 10
7 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
7 | 2022 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 |
7 | 2021 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
7 | 2020 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
7 | 2019 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
7 | 2018 |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | 0 | 0
7 | Prior |  |
Mortgage Loans on Real Estate [Line Items] |  |
Mortgage loans | $ 0 | $ 0

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