Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable, allowances	$ 8.4	$ 10.1
Preferred stock, par value	$ 1	$ 1
Preferred stock, authorized	5,000,000	5,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.25	$ 0.25
Common stock, authorized	600,000,000	600,000,000
Common stock, issued	74,199,143	74,893,483
Common stock, outstanding	74,199,143	74,893,483