Fair Value - Carrying Value and Fair Value Classified by Level (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Carrying Value
Assets:
Mortgage loans	$ 1,524	$ 1,505
Equity securities	555	490
Liabilities:
Investment contract liabilities with a fixed maturity	1	1
Investment contracts liabilities without a fixed maturity	270	312
Long-term debt	64,570	64,151
Estimated Fair Value
Assets:
Mortgage loans	1,524	1,468
Liabilities:
Investment contract liabilities with a fixed maturity	1	1
Investment contracts liabilities without a fixed maturity	251	272
Long-term debt	62,321	58,724
Level 1 | Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contract liabilities with a fixed maturity	0	0
Investment contracts liabilities without a fixed maturity	0	0
Long-term debt	62,321	58,724
Level 2 | Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contract liabilities with a fixed maturity	0	0
Investment contracts liabilities without a fixed maturity	0	0
Long-term debt	0	0
Level 3 | Estimated Fair Value
Assets:
Mortgage loans	1,524	1,468
Liabilities:
Investment contract liabilities with a fixed maturity	1	1
Investment contracts liabilities without a fixed maturity	251	272
Long-term debt	$ 0	$ 0