Acquisition of Controlling Interest in Equity Method Investment	9 Months Ended
	Sep. 30, 2011
Acquisition of Controlling Interest in Equity Method Investment [Abstract]
Acquisition of Controlling Interest in Equity Method Investment [Text Block]	Acquisition of Controlling Interest in Equity Method Investment Effective February 1, 2011, we acquired a controlling interest in the Clemenger Group, our affiliate in Australia and New Zealand, increasing our equity ownership from 46.7% to 73.7%. In connection with this transaction as required by FASB Accounting Standards Codification Topic 805 - Business Combinations, in the first quarter of 2011, we recorded a non-cash gain of $123.4 million resulting from the remeasurement of the carrying value of our equity interest to the acquisition date fair value. The difference between the fair value of our shares at the acquisition date and the carrying value of our investment held prior to the acquisition resulted in the remeasurement gain.

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.