Average debt service coverage ratio.

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- Definition

Current weighted average loan to value ratio of commercial mortgage loan.

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Original weighted average loan to value ratio of commercial mortgage loan.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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

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Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

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

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

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

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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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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.

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Investments - Investments - Loan-to-Value and Debt Service Coverage Ratio by Origination Year (Details) $ in Millions	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Investments [Line Items]
Current Weighted Average Loan to Value Ratio of Commercial Mortgage Loan	55.00%
Original Weighted Average Loan to Value Ratio of Commercial Mortgage loan	59.00%
Commercial Loan [Member]
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.57		2.60
Financing Receivable, before Allowance for Credit Loss	$ 6,405		$ 6,138
Financing Receivable, Allowance for Credit Loss	$ 48	$ 48	$ 51	$ 41	$ 36	$ 36
Commercial Loan [Member] \| Originated in Current Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.65		1.47
Commercial Loan [Member] \| Originated in Fiscal Year Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.42		2.60
Commercial Loan [Member] \| Originated Two Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.60		2.78
Commercial Loan [Member] \| Originated Three Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.86		3.00
Commercial Loan [Member] \| Originated Four Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	3.11		2.76
Commercial Loan [Member] \| Originated Five or More Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.56		2.47
Commercial Loan [Member] \| LTV Greater than 80 Percent
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0.91		1.29
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated in Current Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0		0
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated in Fiscal Year Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0		1.09
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated Two Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.14		1.05
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated Three Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.03		0
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated Four Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0		0
Commercial Loan [Member] \| LTV Greater than 80 Percent \| Originated Five or More Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0.83		1.41
Commercial Loan [Member] \| 65% - 80%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.20		2.25
Commercial Loan [Member] \| 65% - 80% \| Originated in Current Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.31		0
Commercial Loan [Member] \| 65% - 80% \| Originated in Fiscal Year Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	0		2.13
Commercial Loan [Member] \| 65% - 80% \| Originated Two Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.12		2.42
Commercial Loan [Member] \| 65% - 80% \| Originated Three Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.35		3.47
Commercial Loan [Member] \| 65% - 80% \| Originated Four Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	3.58		1.77
Commercial Loan [Member] \| 65% - 80% \| Originated Five or More Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.80		1.77
Commercial Loan [Member] \| Less than 65%
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.71		2.72
Commercial Loan [Member] \| Less than 65% \| Originated in Current Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.69		1.47
Commercial Loan [Member] \| Less than 65% \| Originated in Fiscal Year Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	1.42		2.75
Commercial Loan [Member] \| Less than 65% \| Originated Two Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.76		2.99
Commercial Loan [Member] \| Less than 65% \| Originated Three Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	3.17		2.92
Commercial Loan [Member] \| Less than 65% \| Originated Four Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	3.03		2.90
Commercial Loan [Member] \| Less than 65% \| Originated Five or More Years Before Latest Fiscal Year
Schedule of Investments [Line Items]
Avg. Debt-Service Coverage Ratio	2.78		2.67
Amortized Cost [Member] \| Commercial Loan [Member]
Schedule of Investments [Line Items]
Mortgage loans originated in current year	$ 279		$ 400
Mortgage loans originated in year before latest fiscal year	466		929
Mortgage loans originated two years before latest fiscal year	951		1,600
Mortgage loans originated three years before latest fiscal year	1,570		622
Mortgage loans originated four years before latest fiscal year	620		777
Mortgage loans originated five or more years before latest fiscal year	2,519		1,810
Financing Receivable, before Allowance for Credit Loss	6,405		6,138
Amortized Cost [Member] \| Commercial Loan [Member] \| LTV Greater than 80 Percent
Schedule of Investments [Line Items]
Mortgage loans originated in current year	0		0
Mortgage loans originated in year before latest fiscal year	0		16
Mortgage loans originated two years before latest fiscal year	16		38
Mortgage loans originated three years before latest fiscal year	38		0
Mortgage loans originated four years before latest fiscal year	0		0
Mortgage loans originated five or more years before latest fiscal year	103		105
Financing Receivable, before Allowance for Credit Loss	157		159
Amortized Cost [Member] \| Commercial Loan [Member] \| 65% - 80%
Schedule of Investments [Line Items]
Mortgage loans originated in current year	31		0
Mortgage loans originated in year before latest fiscal year	0		189
Mortgage loans originated two years before latest fiscal year	189		457
Mortgage loans originated three years before latest fiscal year	488		95
Mortgage loans originated four years before latest fiscal year	89		98
Mortgage loans originated five or more years before latest fiscal year	363		252
Financing Receivable, before Allowance for Credit Loss	1,160		1,091
Amortized Cost [Member] \| Commercial Loan [Member] \| Less than 65%
Schedule of Investments [Line Items]
Mortgage loans originated in current year	248		400
Mortgage loans originated in year before latest fiscal year	466		724
Mortgage loans originated two years before latest fiscal year	746		1,105
Mortgage loans originated three years before latest fiscal year	1,044		527
Mortgage loans originated four years before latest fiscal year	531		679
Mortgage loans originated five or more years before latest fiscal year	2,053		1,453
Financing Receivable, before Allowance for Credit Loss	$ 5,088		$ 4,888