Pensions and Other Benefit Programs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
United States
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	$ 4	$ 3
Foreign
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	38	9
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	$ 4	$ 6