Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details)

v2.4.0.8
Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details) (USD $)
9 Months Ended
Sep. 30, 2013
Stock Appreciation Rights (SARs) [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 346,301
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 22.57
Restricted stock units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 200,940
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 58.31
Market Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 100,723
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 82.67
Employee Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 43,521
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 11.75