Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards (Narrative) (Details)

v2.4.0.8
Stock-Based Awards (Narrative) (Details) (USD $)
9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 25,700,000    
Weighted average period of recognition of unrecognized compensation cost, years 2 years 7 months 18 days    
New awards authorized 8,000,000.0    
Available for grants 2,700,000    
Stock-based awards maximum term, years 10 years    
Payments Related to Tax Withholding for Share-based Compensation 13,897,000 15,482,000  
Issuance of common stock from stock-based compensation awards, including tax benefit 15,179,000   21,816,000
Three Year Period Vesting [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Five Year Period Vesting [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%    
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 200.00%    
Market Stock Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, total fair value 8,300,000    
Performance Based Equity Compensation Program [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common stock from stock-based compensation awards, including tax benefit $ 16,800,000