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Segment and Geographic Information - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]      
Total long lived assets $ 27,607.8 $ 29,264.7 $ 30,679.8
U.S.      
Segment Reporting Information [Line Items]      
Total long lived assets $ 11,940.4 $ 11,883.1 $ 11,632.2