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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Fixed maturities, available-for-sale, at fair value, amortized cost | $ 35,612 | $ 31,296
Equity securities, available-for-sale, at fair value, cost | $ 907 | $ 878
Common stock, par value (in USD per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 1,500,000,000 | 1,500,000,000
Common stock, shares issued (in shares) | 384,923,222.00 | 402,923,222
Treasury stock (in shares) | 28,088,186 | 28,974,069
Commercial Loan |  |
Mortgage loans, allowances for loan losses | $ 1 | $ 0
Cash |  |
Variable interest entity assets | 0 | 5
Other Liabilities |  |
Variable interest entity liabilities | $ 0 | $ 5

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