Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities - Additional Information (Details)

v3.5.0.2
Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Jun. 30, 2016
Jun. 30, 2015
Nov. 30, 2014
Oct. 31, 2014
Derivative [Line Items]          
Maximum remaining maturity (in months)   7 months 16 months    
Senior Notes          
Derivative [Line Items]          
Face amount       $ 2,500,000,000.00  
Senior Notes Due November 1, 2024 | Senior Notes          
Derivative [Line Items]          
Face amount         $ 1,250,000,000
Stated interest rate   4.65% [1] 4.65% [1]   4.65%
Senior Notes Due May 1, 2018 | Senior Notes          
Derivative [Line Items]          
Face amount       750,000,000  
Derivatives Designated as Hedging Instruments | Forward Contracts | Senior Notes | Portion of Senior Notes | Cash Flow Hedging          
Derivative [Line Items]          
Derivative, gain on derivative     $ 7,500,000    
Derivatives Designated as Hedging Instruments | Treasury Lock | Senior Notes | Portion of Senior Notes | Cash Flow Hedging          
Derivative [Line Items]          
Notional amount of derivative         $ 1,000,000,000.00
Unrealized gains (losses) on cash flow hedges $ 7,500,000        
Derivatives Designated as Hedging Instruments | Treasury Lock | Senior Notes | Portion of Senior Notes | Cash Flow Hedging | Interest expense          
Derivative [Line Items]          
Unrealized gains (losses) on cash flow hedges   $ 6,300,000      
Gain reclassified from accumulated OCI into income, effective portion   $ 800,000 $ 500,000    
Derivatives Not Designated as Hedging Instruments | Treasury Lock | Senior Notes | Senior Notes Due May 1, 2018          
Derivative [Line Items]          
Notional amount of derivative       $ 750,000,000  
Derivative, gain on derivative $ 1,200,000        
[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%.