v3.4.0.3
Derivative Instruments (Details 4) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]    
Interest expense $ 157 $ 154
Interest Rate Swap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest expense $ 1 $ 1