Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details)

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Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details) - USD ($)
 3 Months Ended
Aug. 06, 2015
Nov. 19, 2014
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2015
Dividends Payable [Line Items]            
Cash dividends declared per share (in dollars per share)     $ 0.52   $ 0.50  
Payment of dividends     $ (101,674,000)   $ (82,413,000)  
Dividends payable - financing activities     20,892,000   0  
Accumulated deficit     (45,055,000)     $ (12,362,000)
Restricted Stock Unit, Performance-Based And Service-Based            
Dividends Payable [Line Items]            
Dividends payable - financing activities     20,900,000      
Regular Cash Dividend            
Dividends Payable [Line Items]            
Cash dividends declared per share (in dollars per share) $ 0.52          
Regular Cash Dividend | Restricted Stock Unit, Performance-Based And Service-Based            
Dividends Payable [Line Items]            
Dividends payable - financing activities     1,100,000   200,000  
Regular Cash Dividend | Retained Earnings            
Dividends Payable [Line Items]            
Payment of dividends         $ (82,400,000)  
Regular Cash Dividend | Additional Paid-in Capital            
Dividends Payable [Line Items]            
Payment of dividends     (81,600,000)      
Special Cash Dividend            
Dividends Payable [Line Items]            
Cash dividends declared per share (in dollars per share)   $ 16.50        
Total amount of dividends accrued       $ 2,760,000,000    
Accumulated deficit   $ 0        
Special Cash Dividend | Restricted Stock Unit, Performance-Based And Service-Based            
Dividends Payable [Line Items]            
Dividends payable - financing activities     19,800,000      
Total special cash dividends paid with respect to fully vested restricted stock units with dividend equivalent rights     $ 20,000,000      
Special Cash Dividend | Retained Earnings            
Dividends Payable [Line Items]            
Total amount of dividends accrued   2,100,000,000        
Special Cash Dividend | Additional Paid-in Capital            
Dividends Payable [Line Items]            
Total amount of dividends accrued   $ 646,500,000