Investments (Credit quality indicator) (Details) - Mortgage loans $ in Millions	Jun. 30, 2026 USD ($)
Debt Securities, Available-for-sale [Line Items]
2026	$ 11
2025	226
2024	101
2023	132
2022	165
Prior	417
Total	1,052
DSCR ≥1.6x | LTV less than 55%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	38
2024	0
2023	33
2022	15
Prior	229
Total	315
DSCR ≥1.6x | LTV 55% to 65%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	37
2024	0
2023	12
2022	12
Prior	0
Total	61
DSCR ≥1.6x | LTV greater than 65%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	0
2024	0
2023	0
2022	0
Prior	13
Total	13
DSCR 1.2x - 1.6x | LTV less than 55%
Debt Securities, Available-for-sale [Line Items]
2026	6
2025	0
2024	68
2023	47
2022	4
Prior	89
Total	214
DSCR 1.2x - 1.6x | LTV 55% to 65%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	107
2024	33
2023	18
2022	52
Prior	19
Total	229
DSCR 1.2x - 1.6x | LTV greater than 65%
Debt Securities, Available-for-sale [Line Items]
2026	5
2025	7
2024	0
2023	0
2022	15
Prior	0
Total	27
DSCR ≤1.2x | LTV less than 55%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	37
2024	0
2023	22
2022	0
Prior	21
Total	80
DSCR ≤1.2x | LTV 55% to 65%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	0
2024	0
2023	0
2022	45
Prior	0
Total	45
DSCR ≤1.2x | LTV greater than 65%
Debt Securities, Available-for-sale [Line Items]
2026	0
2025	0
2024	0
2023	0
2022	22
Prior	46
Total	$ 68