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Consolidated Balance Sheets (Parentheticals) (Unaudited) $ in Millions | Jun. 30, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 78 | $ 14
Available for sale, at amortized cost | 88,516 | 90,493
Debt Securities, Held-to-maturity, Allowance for Credit Loss | 34 | 35
Held to maturity, Fair Value | 9,333 | 10,647
short-term investments amortized cost | 3,433 | 3,147
Premium Receivable, Allowance for Credit Loss | 50 | 46
Reinsurance Recoverable, Allowance for Credit Loss | $ 341 | $ 329
Common Shares, shares issued | shares | 459,555,714 | 474,021,114
Common Shares, shares outstanding | shares | 418,474,087 | 426,572,612
Common Shares in treasury, shares | shares | 41,081,627 | 47,448,502

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