Consolidated Balance Sheets (Parenthetical) $ in Millions	Dec. 31, 2017 USD ($) $ / shares shares
Assets
Cash and cash equivalents	$ 69.8
Investments, at fair value	655.0
Other receivables	21.7
Assets of consolidated investment entities	746.5	[1]
Liabilities
Collateralized loan obligation notes, at fair value	450.7
Other liabilities	122.7
Liabilities of consolidated investment entities	573.4	[1]
Fixed maturity securities available for sale, amortized cost	8,756.5
Equity securities available for sale, cost	$ 316.3
Common stock, par value (in dollars per share) | $ / shares	$ 0.01
Common stock, shares authorized (in shares) | shares	800,000,000
Common stock, shares outstanding (in shares) | shares	52,417,812
Treasury stock, at cost (in shares) | shares	97,974,792

[1] The following table presents information on assets and liabilities related to consolidated investment entities as of December 31, 2017 (there were no such entities as of December 31, 2016).