Derivative Financial Instruments, Outstanding Forward Contracts by Currency (Details) - Foreign Currency Forward Contracts [Member] $ in Millions	Jun. 30, 2017 USD ($)
Derivative [Line Items]
Notional amounts	$ 393
Canadian Dollar [Member]
Derivative [Line Items]
Notional amounts	141
Euro [Member]
Derivative [Line Items]
Notional amounts	100
U.S. Dollar [Member]
Derivative [Line Items]
Notional amounts	97
United Arab Emirates Dirham [Member]
Derivative [Line Items]
Notional amounts	23
British Pound [Member]
Derivative [Line Items]
Notional amounts	21
Other [Member]
Derivative [Line Items]
Notional amounts	$ 11