Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Receivables, allowance for doubtful accounts	$ 64.9	$ 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	55,200,000	36,400,000