Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Condensed Consolidated Balance Sheets
Receivables, allowance (in dollars)	$ 3.5	$ 3.3
Property, plant and equipment, accumulated depreciation (in dollars)	$ 502.4	$ 468.0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, Authorized shares	5,000,000	5,000,000
Preferred stock, unissued shares	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, Authorized shares	100,000,000	100,000,000
Common stock, shares issued	78,661,248	78,661,248
Common stock, shares outstanding	64,163,328	63,658,777
Treasury, shares	14,249,807	14,761,481