Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v2.4.0.8
Stockholders' Equity (Details) (USD $)
 0 Months Ended 12 Months Ended
Feb. 20, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Class of Stock [Line Items]        
Stock Repurchased and Retired During Period, Shares   11,537,000    
Payments for Repurchase of Common Stock   $ 289,864,000 $ 0 $ 0
Stock Repurchase Program, Remaining Authorized Repurchase Amount   110,000,000    
Stock Repurchase Program, Authorized Amount $ 400,000,000 $ 800,000,000    
Common Class A [Member]
        
Class of Stock [Line Items]        
Common Stock, Capital Shares Reserved for Future Issuance   18,765,137    
Common Stock, Shares Authorized   2,000,000,000    
Common Class C [Member]
        
Class of Stock [Line Items]        
Common Stock, Shares Authorized   2,000,000,000