Retirement Benefits (Schedule of Estimated Amounts That Will Be Amortized from Accumulated Other Comprehensive in the Next Fiscal Year) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	$ 0
Net actuarial loss	37
Projected cost (credit)	37
Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	(2)
Net actuarial loss	126
Projected cost (credit)	124
Non-U.S. Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	0
Net actuarial loss	1
Projected cost (credit)	1
U.S. Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	(3)
Net actuarial loss	1
Projected cost (credit)	$ (2)