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Goodwill (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2011
Jun. 30, 2010
Goodwill [Line Items]      
Goodwill, Beginning Balance $ 1,154.9 $ 1,295.2 $ 1,084.7
Translation adjustment 140.3 (219.8) 70.2
Goodwill, Ending Balance $ 1,295.2 $ 1,075.4 $ 1,154.9