Pensions and Other Benefit Programs (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
United States
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	$ 8	$ 6
Foreign
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	41	12
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	$ 14	$ 16