Consolidated Balance Sheets (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for receivables	$ 11.6	$ 14.0
Preferred Stock, Shares Authorized	2,357,299	2,357,299
Preferred stock, 6 3/4% Cumulative Convertible, shares issued	155,250	155,250
Preferred stock, 6 3/4% Cumulative Convertible, shares outstanding	155,250	155,250
Preferred Stock, Depositary Shares	3,105,000	3,105,000
Preferred Stock, Liquidation Preference Per Share	$ 1,000	$ 1,000
Preferred Stock, Liquidation Depositary Per Shares	$ 50	$ 50
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Authorized	480,000,000	480,000,000
Common Stock, Shares, Issued	196,322,649	198,354,851
Common Stock, Shares, Outstanding	195,721,796	197,841,276