Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowances	$ 0.8	$ 0.8
Preferred Stock, par value	$ 1.00	$ 1.00
Preferred Stock, Authorized	2,500,000	2,500,000
Preferred Stock, issued
Common Stock, par value	$ 1.00	$ 1.00
Common Stock, Authorized	300,000,000	300,000,000
Common Stock, shares issued	146,427,550	146,427,550
Common stock in treasury, shares	8,259,012	7,646,419