Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities - Additional Information (Details)

v3.2.0.727
Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Jun. 30, 2015
Nov. 30, 2014
Oct. 31, 2014
Jun. 30, 2014
Derivative [Line Items]          
Maximum remaining maturity   18 months      
Unrealized Gains (Losses) on Cash Flow Hedges   $ 4,553,000     $ (12,000)
Long-term debt, gross   $ 3,211,250,000     750,000,000
Higher remaining maturity range   16 months      
Senior Notes          
Derivative [Line Items]          
Face amount     $ 2,500,000,000.00    
Senior Notes | Senior Notes Due November 1, 2024          
Derivative [Line Items]          
Face amount       $ 1,250,000,000  
Stated interest rate   4.65% [1]   4.65%  
Long-term debt, gross [1]   $ 1,250,000,000     $ 0
Senior Notes | Senior Notes Due May 1, 2018          
Derivative [Line Items]          
Stated interest rate         6.90%
Long-term debt, gross   0     $ 750,000,000
Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedging | Portion of Senior Notes | Treasury Lock | Senior Notes          
Derivative [Line Items]          
Derivative, notional amount       $ 1,000,000,000.00  
Unrealized Gains (Losses) on Cash Flow Hedges $ 7,500,000 7,500,000      
Forward Contracts | Not Designated as Hedging Instrument | Senior Notes Due May 1, 2018 | Treasury Lock | Senior Notes          
Derivative [Line Items]          
Derivative, gain on derivative $ 1,200,000        
Forward Contracts | Interest Expense | Designated as Hedging Instrument | Cash Flow Hedging | Portion of Senior Notes | Treasury Lock | Senior Notes          
Derivative [Line Items]          
Gain reclassified from accumulated OCI into income, effective portion   $ 500,000      
[1] The effective interest rate disclosed above for this series of Senior Notes excludes the impact of the treasury rate lock hedge discussed below. The effective interest rate including the impact of the treasury rate lock hedge was 4.626%.