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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 | Mar. 31, 2021 USD ($) | [1]
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Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | $ 15
2020 | 161
2019 | 284
2018 | 103
2017 | 178
Prior | 328
Total | 1,069
DSCR Greater than or Equal to 1.6x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 75
2019 | 32
2018 | 36
2017 | 114
Prior | 187
Total | 444
DSCR Greater than or Equal to 1.6x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 14
2019 | 20
2018 | 14
2017 | 15
Prior | 11
Total | 74
DSCR Greater than or Equal to 1.6x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 5
2019 | 5
Prior | 24
Total | 34
DSCR Between 1.2 to 1.6x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 16
2017 | 5
Prior | 77
Total | 98
DSCR Between 1.2 to 1.6x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2020 | 20
2019 | 40
2018 | 53
2017 | 27
Total | 140
DSCR Between 1.2 to 1.6x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2021 | 10
2020 | 52
2019 | 44
2017 | 9
Prior | 12
Total | 127
DSCR Less than or Equal to 1.2x, LTV Less than 55% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 50
2017 | 8
Prior | 10
Total | 68
DSCR Less than or Equal to 1.2x, LTV 55% to 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 48
Total | 48
DSCR Less than or Equal to 1.2x, LTV Greater than 65% [Member] |
Mortgage Loans Amortized Cost Basis by Origination Year [Abstract] |
2019 | 29
Prior | 7
Total | $ 36
[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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