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Consolidated Balance Sheets Parenthetical (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 8.9	$ 7.2
Par value	$ 1	$ 1
Shares authorized	100
Shares issued and outstanding	46.9	46.4

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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