Annual report pursuant to Section 13 and 15(d)

Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Parenthetical) (Detail)

v2.4.0.8
Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Parenthetical) (Detail) (China [Member], USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
China [Member]
      
Segment Reporting Information [Line Items]      
China sales person compensation and service fee costs $ 123.5 $ 96.8 $ 87.3