Investments - Schedule of Investment Holdings, Other Than Securities (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Investments, All Other Investments [Abstract]
Other invested assets	$ 11,508	$ 10,839
Whole Life Insurance
Investments, All Other Investments [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	3,080	2,927
Equity Method Investments
Investments, All Other Investments [Abstract]
Equity method investments	3,087	3,136
Limited Partnership Investments
Investments, All Other Investments [Abstract]
Limited Partnership Investments	3,646	3,033
Other Invested Assets
Investments, All Other Investments [Abstract]
Other invested assets	$ 1,695	$ 1,743

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.