Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Receivables, allowance for doubtful accounts	$ 62.6	$ 71.0
Preferred stock, par value	$ 1	$ 1
Preferred stock, authorized	2,000,000	2,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 1.25	$ 1.25
Common stock, authorized	500,000,000	500,000,000
Common stock, issued	243,000,000	243,000,000
Treasury stock, shares	64,500,000	36,400,000