Pensions and Other Benefit Programs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
United States
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer	$ 4	$ 7
Foreign
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer		39	$ 11
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Contributions By Employer		$ 8	$ 11