Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Assets
Trade receivables, allowances	$ 37.1	$ 23.2
Property and equipment, accumulated depreciation	488.0	449.2
Finite-Lived Intangible Assets, Accumulated Amortization	180.6	139.0
Investments in real estate ventures - fair value	$ 212.7	$ 155.2
Company shareholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	45,213,832	45,049,503
Common stock, shares outstanding (in shares)	45,213,832	45,049,503