v3.7.0.1
Derivative Instruments and Hedging Activities (Schedule of Interest Rate Swap Contracts) (Details) - Designated as Hedging Instrument [Member] - USD ($)
$ in Millions
Apr. 27, 2017
Mar. 31, 2017
Interest Rate Swap One [Member]    
Derivative [Line Items]    
Derivative, notional amount   $ 656
Derivative, fixed interest rate   0.98%
Interest Rate Swap Two [Member]    
Derivative [Line Items]    
Derivative, notional amount   $ 300
Derivative, fixed interest rate   1.29%
Interest Rate Swap Three [Member]    
Derivative [Line Items]    
Derivative, notional amount   $ 300
Derivative, fixed interest rate   2.08%
Subsequent Event [Member] | Interest Rate Swap Four [Member]    
Derivative [Line Items]    
Derivative, notional amount $ 200  
Derivative, fixed interest rate 1.62%  
Subsequent Event [Member] | Interest Rate Swap Five [Member]    
Derivative [Line Items]    
Derivative, notional amount $ 200  
Derivative, fixed interest rate 1.40%