Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts Receivable, Current	$ 36.0	$ 43.0
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	800,000,000	800,000,000
Common stock, Outstanding shares, before treasury	305,300,000	307,200,000
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, Shares	17,000,000	16,700,000