XML 38 R28.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Fair Values of Derivative Instruments Included on the Consolidated Balance Sheet (Parenthetical) (Detail) (USD $)
In Millions
Dec. 31, 2010
Derivatives, Fair Value [Line Items]  
Derivatives asset fair value measurements netting adjustment $ 0.3
Derivatives liability fair value measurements netting adjustment $ 0.3