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Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Statement of Financial Position [Abstract] |  |
Fixed income securities, at fair value, amortized cost (in dollars) | $ 60,534 | $ 56,293
Equity securities, at fair value, cost (in dollars) | 3,817 | 6,568
Short-term, at fair value, amortized cost (in dollars) | $ 5,343 | $ 4,256
Preferred stock, par value (in dollars per share) | $ 1 | $ 1
Preferred stock, shares authorized (in shares) | 25,000,000 | 25,000,000
Preferred stock, shares issued (in shares) | 81,000 | 92,500
Preferred stock, shares outstanding (in shares) | 81,000 | 92,500
Preferred stock, shares aggregate liquidation preference (in shares) | $ 2,025 | $ 2,313
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 3,000,000,000 | 2,000,000,000
Common stock, shares issued (in shares) | 900,000,000 | 900,000,000
Common stock, shares outstanding (in shares) | 313,000,000 | 319,000,000
Treasury Stock, shares (in shares) | 587,000,000 | 581,000,000

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