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Unaudited Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Millions, $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Available for sale securities, amortized cost | $ 26,481 | $ 26,195
Allowance for credit losses on investments | 32 | 28
Allowance for credit losses on premiums receivable | 32 | 34
Allowance for credit losses on reinsurance recoverable | 16 | 21
Allowance for credit losses on contractholder receivable | $ 3 | $ 3
Common shares, par value per share | $ 0.0011 | $ 0.0011
Common shares issued (shares) | 594.3 | 591.9
Common shares held in treasury (shares) | 219.0 | 218.5
Fixed maturities |  |
Available for sale securities, amortized cost | $ 24,338 | $ 24,131
Allowance for credit losses on investments | 32 | 28
Short-term investments |  |
Available for sale securities, amortized cost | 2,143 | 2,064
Allowance for credit losses on investments | $ 0 | $ 0

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