Quarterly report pursuant to Section 13 or 15(d)

Debt - Senior Notes (Details)

v3.4.0.3
Debt - Senior Notes (Details) - USD ($)
3 Months Ended 9 Months Ended
Nov. 19, 2014
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2016
Mar. 31, 2015
Jun. 30, 2015
Nov. 30, 2014
Oct. 31, 2014
Debt Instrument                  
Cash dividends declared (in dollars per share)   $ 0.52 $ 0.50   $ 1.56 $ 18      
Discount on debt   $ 3,415,000     $ 3,415,000   $ 3,723,000    
2018 Senior Notes | Senior notes | Treasury lock | Derivatives Not Designated as Hedging Instruments                  
Debt Instrument                  
Notional amount of derivative               $ 750,000,000  
Portion of senior notes | Cash flow hedging | Senior notes | Treasury lock | Derivatives designated as hedging instruments                  
Debt Instrument                  
Notional amount of derivative                 $ 1,000,000,000.00
Special cash dividend                  
Debt Instrument                  
Cash dividends declared (in dollars per share) $ 16.50     $ 16.50          
Cash dividends       $ 2,760,000,000          
Senior notes                  
Debt Instrument                  
Principal amount               2,500,000,000.0  
Discount on debt               $ 4,000,000  
Debt frequency of payment         semi-annually        
Offer to repurchase senior notes, percent of principal amount (as a percent)         101.00%        
Fair value   $ 2,560,000,000     $ 2,560,000,000   $ 2,520,000,000    
Senior notes | Standard & Poor's, BBplus Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.25%        
Senior notes | Standard & Poor's, BB Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.50%        
Senior notes | Standard & Poor's, BB- Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.75%        
Senior notes | Standard & Poor's, B Plus or Below                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         1.00%        
Senior notes | Moody's, Ba1 Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.25%        
Senior notes | Moody's, Ba2 Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.50%        
Senior notes | Moody's, Ba3 Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         0.75%        
Senior notes | Moody's, B1 Rating                  
Debt Instrument                  
Decrease in credit rating, interest rate increase (in bps)         1.00%