Quarterly report pursuant to Section 13 or 15(d)

Debt - Senior Notes (Details)

v3.3.0.814
Debt - Senior Notes (Details) - USD ($)
 3 Months Ended
Nov. 19, 2014
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2015
Nov. 30, 2014
Oct. 31, 2014
Debt Instrument [Line Items]              
Cash dividends declared per share (in dollars per share)   $ 0.52   $ 0.50      
Discount on debt   $ 3,621,000     $ 3,723,000    
Portion of senior notes | Cash Flow Hedging | Senior Notes | Treasury Lock | Forward Contracts | Derivatives Designated as Hedging Instruments              
Debt Instrument [Line Items]              
Notional amount of derivative             $ 1,000,000,000.00
Special Cash Dividend              
Debt Instrument [Line Items]              
Cash dividends declared per share (in dollars per share) $ 16.50            
Cash dividends     $ 2,760,000,000        
Senior Notes              
Debt Instrument [Line Items]              
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   101.00%          
Fair value   $ 2,520,000,000     $ 2,520,000,000    
Senior Notes | Standard & Poor's, BBplus Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.25%          
Senior Notes | Standard & Poor's, BB Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.50%          
Senior Notes | Standard & Poor's, BB- Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.75%          
Senior Notes | Standard & Poor's, B Plus or Below              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   1.00%          
Senior Notes | Moody's, Ba1 Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.25%          
Senior Notes | Moody's, Ba2 Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.50%          
Senior Notes | Moody's, Ba3 Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   0.75%          
Senior Notes | Moody's, B1 Rating              
Debt Instrument [Line Items]              
Decrease in credit rating, interest rate increase   1.00%          
Senior Notes | 2018 Senior Notes              
Debt Instrument [Line Items]              
Principal amount           $ 750,000,000