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Unaudited Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Millions, $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available for sale securities, amortized cost | $ 34,171 | $ 30,354
Allowance for credit losses on investments | 21 | 22
Allowance for credit losses on premiums receivable | 54 | 45
Allowance for credit losses on reinsurance recoverable | 19 | 17
Allowance for credit losses on contractholder receivable | $ 6 | $ 5
Common shares, par value per share | $ 0.0011 | $ 0.0011
Common shares issued (shares) | 599.2 | 595.6
Common shares held in treasury (shares) | 231.9 | 219.2
Fixed maturities |  |
Available for sale securities, amortized cost | $ 31,821 | $ 27,570
Allowance for credit losses on investments | 21 | 22
Short-term investments |  |
Available for sale securities, amortized cost | 2,350 | 2,784
Allowance for credit losses on investments | $ 0 | $ 0

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