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Investments - Schedule of Bank Loans Amortized Cost by Credit Rating and Year of Origination (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Amortized cost, net	$ 842	$ 879
Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	585	490
Allowance	(21)	(17)
Amortized cost, net	564	473
NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	217	199
NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	222	144
NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	28	23
NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	102	106
NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	16	$ 18
2021 and prior \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	2
2021 and prior \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2021 and prior \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2021 and prior \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2021 and prior \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	2
2021 and prior \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2022 \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	1
2022 \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2022 \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2022 \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2022 \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2022 \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	1
2023 \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	29
2023 \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2023 \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2023 \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	2
2023 \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	20
2023 \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	7
2024 \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	61
2024 \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	43
2024 \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	1
2024 \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	4
2024 \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	12
2024 \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	1
2025 \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	312
2025 \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	134
2025 \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	141
2025 \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	6
2025 \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	31
2025 \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	0
2026 \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	180
2026 \| NAIC 1 / A \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	40
2026 \| NAIC 2 / BBB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	80
2026 \| NAIC 3 / BB \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	16
2026 \| NAIC 4 / B \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	37
2026 \| NAIC 5-6 / CCC and below \| Bank loans, net
Debt Securities, Available-for-Sale [Line Items]
Amortized cost before allowance	$ 7