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Unaudited Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Available for sale securities, amortized cost	$ 23,475	$ 22,615
Allowance for credit losses on investments	56	41
Allowance for credit losses on premiums receivable	36	35
Allowance for credit losses on reinsurance recoverable	21	22
Allowance for credit losses on contractholder receivable	$ 2	$ 3
Common shares, par value per share	$ 0.0011	$ 0.0011
Common shares issued (shares)	590.5	588.3
Common shares held in treasury (shares)	218.3	217.9
Fixed maturities
Available for sale securities, amortized cost	$ 21,922	$ 21,282
Allowance for credit losses on investments	56	41
Short-term investments
Available for sale securities, amortized cost	1,553	1,333
Allowance for credit losses on investments	$ 0	$ 0

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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