Quarterly report pursuant to Section 13 or 15(d)

Debt - Senior Notes (Details)

v3.6.0.2
Debt - Senior Notes (Details) - USD ($)
3 Months Ended 6 Months Ended
Nov. 19, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Nov. 30, 2014
Oct. 31, 2014
Debt Instrument                
Cash dividends declared (in dollars per share)   $ 0.54 $ 0.52 $ 1.06 $ 1.04      
Unamortized discount   $ 3,107,000   $ 3,107,000   $ 3,312,000    
Treasury lock | Derivatives designated as hedging instruments | Cash flow hedge contracts | Senior notes | Portion of senior notes                
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              
Cash dividends $ 2,760,000,000              
Senior notes                
Debt Instrument                
Face amount             $ 2,500,000,000.0  
Decrease in credit rating, interest rate adjustment (in bps)       1.00%        
Unamortized discount             4,000,000  
Frequency of periodic payment       semi-annually        
Redemption price (as a percent)       101.00%        
Fair value disclosure   $ 2,620,000,000   $ 2,620,000,000   $ 2,680,000,000    
Senior notes | Treasury lock | Derivatives Not Designated as Hedging Instruments | 2018 Senior Notes                
Debt Instrument                
Notional amount of derivative             $ 750,000,000  
Senior notes | Standard & Poor's, BB plus Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.25%        
Senior notes | Standard & Poor's, BB Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.50%        
Senior notes | Standard & Poor's, BB- Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.75%        
Senior notes | Standard & Poor's, B Plus or Below                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       1.00%        
Senior notes | Moody's, Ba1 Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.25%        
Senior notes | Moody's, Ba2 Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.50%        
Senior notes | Moody's, Ba3 Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       0.75%        
Senior notes | Moody's, B1 Rating                
Debt Instrument                
Decrease in credit rating, interest rate adjustment (in bps)       1.00%