Pension Benefits Expected Future Benefit Payments (Details) $ in Millions	Dec. 31, 2017 USD ($)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 10
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	8
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	4
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	3
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	3
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	52
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	33
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	35
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	38
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	39
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 242