Investments -Commercial Mortgage Loans Segregated By Risk (Details) - Commercial mortgage loans - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Credit Quality Indicator Current Year [Abstract]
Total	$ 2,470	$ 2,416
Credit Quality Indicator Prior Year [Abstract]
Total	2,470	2,416
Term Loans
Credit Quality Indicator Current Year [Abstract]
2023	53	350
2022	354	1,300
2021	1,301	488
2020	486	0
2019	0	0
Prior	276	278
Total	2,470	2,416
Credit Quality Indicator Prior Year [Abstract]
2022	53	350
2021	354	1,300
2020	1,301	488
2019	486	0
2018	0	0
Prior	276	278
Total	2,470	2,416
Current (less than 30 days past due) \| Term Loans
Credit Quality Indicator Current Year [Abstract]
2023	53	350
2022	354	1,300
2021	1,301	488
2020	486	0
2019	0	0
Prior	267	269
Total	2,461	2,407
Credit Quality Indicator Prior Year [Abstract]
2022	53	350
2021	354	1,300
2020	1,301	488
2019	486	0
2018	0	0
Prior	267	269
Total	2,461	2,407
30-89 days past due \| Term Loans
Credit Quality Indicator Current Year [Abstract]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Total	0	0
Credit Quality Indicator Prior Year [Abstract]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Total	0	0
90 Days or more past due \| Term Loans
Credit Quality Indicator Current Year [Abstract]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	9	9
Total	9	9
Credit Quality Indicator Prior Year [Abstract]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	9	9
Total	$ 9	$ 9

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Credit Quality Indicator Prior Year

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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-Publisher FASB
-Name Accounting Standards Codification
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Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

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