Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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+ Details

Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	9 Months Ended
	Jun. 30, 2012	Sep. 30, 2012	Mar. 31, 2012	Feb. 29, 2012	Dec. 31, 2011
Fair Value Measurements [Abstract]
Percentage of limited partnership interest	10.00%	10.00%
Adjustment Interval of Variable Rate on Interest Rate Swap		90
Number of shares comprising Available for Sale Securities	7.0	2.9
Interest rate swap agreement for notional amount		$ 100		$ 150
Selling of interest rate swap				1.2
Fair value of long term debt		2,048.3	2.0		1,749.8
Business Acquisition, Contingent Consideration, at Fair Value		$ 10.8