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Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fixed maturities available for sale, at amortized cost	$ 30,354	$ 26,195
Allowance for credit losses on investments	22	28
Investments accounted for using the fair value option	3,066	2,488
Allowance for credit losses on premiums receivable	45	34
Allowance for credit losses on reinsurance recoverable	17	21
Allowance for credit loss on contractholder receivable	$ 5	$ 3
Common shares, par value per share	$ 0.0011	$ 0.0011
Common shares issued (shares)	595.6	591.9
Common shares held in treasury (shares)	219.2	218.5
Fixed maturities available for sale, at fair value
Fixed maturities available for sale, at amortized cost	$ 27,570	$ 24,131
Allowance for credit losses on investments	22	28
Short-term investments, at fair value
Fixed maturities available for sale, at amortized cost	2,784	2,064
Allowance for credit losses on investments	$ 0	$ 0

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