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Investments, Amortized Cost Basis of Mortgage Loans for Each Credit Quality Indicator by Year of Origination (Details) - Mortgage Loans [Member] $ in Millions | Sep. 30, 2021 USD ($) | [1]
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Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | $ 63
2020 | 161
2019 | 282
2018 | 86
2017 | 169
Prior | 296
Total | 1,057
DSCR Greater than or Equal to 1.6x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 8
2020 | 75
2019 | 16
2018 | 37
2017 | 116
Prior | 203
Total | 455
DSCR Greater than or Equal to 1.6x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 38
2019 | 15
2018 | 18
Prior | 1
Total | 72
DSCR Greater than or Equal to 1.6x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 17
2019 | 14
2018 | 7
Prior | 23
Total | 61
DSCR Between 1.2 to 1.6x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 13
2020 | 15
2019 | 95
2017 | 5
Prior | 58
Total | 186
DSCR Between 1.2 to 1.6x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 25
2018 | 24
2017 | 10
Prior | 4
Total | 63
DSCR Between 1.2 to 1.6x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 24
2019 | 9
2017 | 8
Total | 41
DSCR Less than or Equal to 1.2x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 35
2017 | 30
Total | 65
DSCR Less than or Equal to 1.2x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 42
Total | 42
DSCR Less than or Equal to 1.2x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 9
2019 | 56
Prior | 7
Total | $ 72
[1] | The values in the table above reflect DSCR on a standardized amortization period and LTV ratios based on the most recent appraised values trended forward using changes in a commercial real estate price index.

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