Equity Method Investments	12 Months Ended
Equity Method Investments	Dec. 31, 2011
Acquisition of Controlling Interest in Equity Method Investment [Abstract]
Equity Method Investments [Text Block]	Equity Method Investments Our equity interest in the net income of our equity method investments for 2011, 2010 and 2009 was $17.2 million, $33.5 million and $30.8 million, respectively. At December 31, 2011 and 2010, our equity interest in the net assets of our equity method investments was $68.4 million and $169.1 million, respectively. Our equity method investments are not material to our results of operations or financial position and therefore, summarized financial information is not required to be presented. Effective February 1, 2011, we acquired a controlling interest in the Clemenger Group, our affiliate in Australia and New Zealand, increasing our equity ownership to 73.7% from 46.7%. In connection with this transaction we recorded a remeasurement gain of $123.4 million in the first quarter of 2011. Additionally, in 2011, we acquired a controlling interest in affiliates in India and Turkey increasing our equity ownership to 100% and 76%, respectively. In connection with these transactions, we recorded a remeasurement gain of $15.1 million. In 2010, we acquired a controlling interest in affiliates in the Middle East and South America bringing our equity ownership to 68.6% and 100%, respectively. In connection with these transactions, we recorded a remeasurement gain of $26.0 million. In 2009, we acquired a controlling interest in a Middle East affiliate bringing our equity ownership to 85%. In connection with this transaction, we recorded a remeasurement gain of $41.3 million. The differences between the fair value of our shares at the acquisition dates and the carrying value of the investments prior to the acquisitions resulted in the remeasurement gains. The purchase prices were negotiated at fair value in arms-length transactions. In addition, we performed a valuation of the businesses and confirmed the fair values used to determine the remeasurement gains. We used the following valuation methodologies to confirm the fair values: the income approach which utilized discounted expected future cash flows, comparative market participant multiples of EBITDA (earnings before interest, taxes, depreciation and amortization) and, when available, comparable transactions

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.

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