v2.4.0.8
Other Comprehensive Income (Loss) and Related Tax Effects (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other comprehensive income, tax (expense) benefit      
Tax effects on foreign currency translation adjustments $ 0    
Tax effects on unrealized gains or losses on available-for-sale securities 0    
Cumulative foreign currency translation losses $ 32.1 $ 16.6 $ 14.0