Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Receivables, allowances	$ 17.2	$ 19.2
Property, plant and equipment, accumulated depreciation	993.9	892.1
Intangible assets, accumulated amortization	$ 158.7	$ 139.9
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	12,000,000.0	12,000,000.0
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	600,000,000	600,000,000.0
Common stock, shares issued (in shares)	286,300,000	286,300,000
Common stock, shares outstanding (in shares)	225,700,000	226,800,000
Common stock, held in employee benefit trust (in shares)	200,000	200,000
Treasury stock (in shares)	60,442,000	59,356,000