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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Fixed maturities, at amortized cost | $ 6,299.7 | $ 6,284.5
Debt, at fair value | $ 817.0 | $ 911.2
Common stock, par value (in dollars per share) | $ 0.1 | $ 0.1
Common stock, shares authorized (in shares) | 100,000,000 | 100,000,000
Common stock, shares issued (in shares) | 66,641,693 | 64,756,833
Common stock, shares outstanding (in shares) | 66,641,693 | 64,756,833
Federal Home Loan Bank of Chicago |  |
Collateralized investment borrowings, at fair value | $ 137.6 | $ 10.0

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