Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Allowance for doubtful accounts	$ 39.3	$ 22.2
Liabilities and Shareholders' Equity
Convertible perpetual preferred stock, par value	$ 0.00	$ 0.10
Convertible perpetual preferred stock, shares authorized	0	1,500,000
Convertible perpetual preferred stock, shares issued	0	96,245
Convertible perpetual preferred stock, liquidation preference	$ 0	$ 1,000
HealthSouth shareholders' equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	108,275,900	104,058,832
Treasury stock, shares	18,145,822	16,270,159