Investments - Mortgage Loans, Net (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Mortgage Loans	$ 33,392	$ 30,811
Mortgage loans
Loans and Leases Receivable Disclosure [Line Items]
Mark to fair value	(2,582)	(2,842)
Commercial mortgage loans
Loans and Leases Receivable Disclosure [Line Items]
Mortgage loans, net of allowances	21,023	20,108
Mark to fair value	(1,740)	(1,743)
Investment Owned, Balance, Principal Amount	22,763	21,851
Commercial mortgage loans \| Commercial mortgage loans
Loans and Leases Receivable Disclosure [Line Items]
Investment Owned, Balance, Principal Amount	21,743	21,061
Commercial mortgage loans \| Commercial mortgage loans under development
Loans and Leases Receivable Disclosure [Line Items]
Investment Owned, Balance, Principal Amount	1,020	790
Residential mortgage loans
Loans and Leases Receivable Disclosure [Line Items]
Mortgage loans, before allowance for credit losses	13,211	11,802
Mortgage loans, net of allowances	12,369	10,703
Mark to fair value	$ (842)	$ (1,099)

Mortgage Loans

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

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- Definition

For investments which are quantified by principal amount, the principle balance held at close of period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

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- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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