Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Receivables, allowance for doubtful accounts	$ 61.1	$ 62.6
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	62,700,000	64,500,000