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Equity Method Investments in Affiliates (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 12 Months Ended
Jan. 31, 2011
Dec. 31, 2010
Ownership percentage of the company   80.00%
Whitehall Group [Member]
   
Equity method investment voting rights   49.00%
Dividends received $ 7.6 $ 10.9
Moet Hennessy [Member]
   
Ownership percentage of the company   50.00%
Equity method investment voting rights   25.00%