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Consolidated Balance Sheets (Parentheticals) $ in Millions | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Fixed maturities, available-for-sale, valuation allowance | $ 169 | $ 14
Fixed maturities, available-for-sale, at amortized cost | 93,355 | 90,493
Fixed maturities, held-to-maturity, valuation allowance | 34 | 35
Fixed maturities, held-to-maturity, fair value | 8,439 | 10,647
Short-term investments amortized cost | 4,962 | 3,147
Premium Receivable, Allowance for Credit Loss | 52 | 46
Valuation allowance for uncollectible reinsurance | $ 351 | $ 329
Common Shares, shares issued | shares | 446,376,614 | 474,021,114
Common Shares, shares outstanding | shares | 414,594,856 | 426,572,612
Treasury Stock, Shares | shares | 31,781,758 | 47,448,502

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